Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fd59a5b3584068…

MALICIOUS

PDF

118.0 KB Created: 2021-03-19 14:11:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a98b2d4dfb12fb278b5b08e446aa3d6b SHA-1: f2f2c970102a0f2c47e847e886b80f84a4d9ba1e SHA-256: 07fd59a5b3584068bed451eb92b4287e9d0c448ff92e1e7e61beaa8b0ba8195f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external URLs pointing to other PDF files hosted on potentially disposable domains. The primary purpose appears to be SEO manipulation or directing users to malicious content, leveraging the PDF format to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/award?keyword=emerald+tablets+of+hermes+trismegistus+pdf PDF link annotation
    • https://cdn.sqhk.co/kemivabesu/hhy56ib/82471334218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_6039e91e3146a.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/durukexaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_600a50c1e047e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384461/normal_5fdb9282ca5c7.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/Chcgfia/free_play_slot_machines_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/jijiVig/destiny_s_child_song_brown_eyes_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/WQsMRvD/my_bt_login.pdfIn PDF document text
    • http://xikapajami.mypressonline.com/upsc_sociology_optional_syllabus_in_english.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/can_you_bake_pizza_in_a_toaster_oven.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/SIicChc/66673945812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465133/normal_60501f8579bb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489415/normal_5fe7a6666b42f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_81207650320e4ea9ba439457017f45bd.pdf?index=trueIn PDF document text
    • http://donijexufenu.onlinewebshop.net/liftmaster_387lm_reset.pdfIn PDF document text
    • https://7469a0d6-6819-4035-9404-80e80fbd4bd5.filesusr.com/ugd/c34eac_ab597903a2e24afbadf7f36f2ea1639c.pdf?index=trueIn PDF document text
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_fcf327d285ba43d094f8f398f3d5615a.pdf?index=trueIn PDF document text
    • https://013c3ecd-17dd-4738-ad87-554153c764a5.filesusr.com/ugd/36f25b_91e9dea3f335429bb8dac70091de14ff.pdf?index=trueIn PDF document text
    • https://c30b87d5-e38e-4f4c-8f61-e356d9eaafe8.filesusr.com/ugd/347120_9c647f9effbd467cad62200ca699113c.pdf?index=trueIn PDF document text
    • http://japinoxizidunub.myartsonline.com/how_to_say_you_have_good_time_management_skills.pdfIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_84b6b6e03c0d4792ab79ea257a1fd35f.pdf?index=trueIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_ce457b25980946e69f6ec9e9c19455b0.pdf?index=trueIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_b45062d144de4ba18714fca17dd367b8.pdf?index=trueIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_2ca6e8f08c8142c08d900058a7f19e3f.pdf?index=trueIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_366a6a6bcda24314b67a93277a767ddd.pdf?index=trueIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_41fc12612e9e4d36a072982e5e2c400b.pdf?index=trueIn PDF document text
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_f7f2956f65f24afc85e4634e646e0d9e.pdf?index=trueIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_03d678e3d97b4d06a587b87df60c6019.pdf?index=trueIn PDF document text
    • https://351e5f87-f9e5-4015-92cd-d601692b9ec3.filesusr.com/ugd/a0d0d3_015e63a75a8a4d7eab589c465d3efa6e.pdf?index=trueIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_2408d0294d8544ceab31b7624a90af0e.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000196ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x196AD 28640 bytes
SHA-256: 967838781d412b9d0925f8ed76ce1aec6c0d4aa2af304ba45422c6c41dfbffe2
font_00_sfnt_off00015533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15533 5552 bytes
SHA-256: 2f46be75ddbdd55c282b9223612e365953f691294122877912f5692a4415359a
font_01_sfnt_off000167e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167E2 15560 bytes
SHA-256: df838df2cde90209b49061c6c420668ca34eb90b5de7ff2b0705e1428eff03d5

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