Malicious PDF — malware analysis report

Static analysis result for SHA-256 560d547a5ec253c2…

MALICIOUS

PDF

85.3 KB Created: 2021-03-16 19:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c0822364a40290ef67117741b0eb6485 SHA-1: b3ff30729c4d700a2589579ea1a2e4b0eca315c0 SHA-256: 560d547a5ec253c27406980ac18e822b6a60e939a5311804c159ed6743e91077
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a link farm designed to lure users with the promise of "epic sports fails gifs". The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/wix?keyword=epic+sports+fails+gifs PDF link annotation
    • https://cdn.sqhk.co/xatuxazaz/ghhfn6B/leadership_skills_training_program_for_chief_residents.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/how_to_put_graco_stroller_back_together.pdfIn PDF document text
    • http://nuwojukow.mygamesonline.org/foolish_heart_steve_perry.pdfIn PDF document text
    • http://midunetojonawiw.mywebcommunity.org/whirlpool_wtw5000dw1_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/rinovizifim/hbhcghC/bujebowowu.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/2hhYjhS/dark_legends_mod_apk_android_1.pdfIn PDF document text
    • https://rogefuza.weebly.com/uploads/1/3/4/6/134688393/kaxojolologo.pdfIn PDF document text
    • https://wijirejilape.weebly.com/uploads/1/3/2/8/132816202/pifufibupuda-xixedekedagox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeborawaleko.atwebpages.com/17849397037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d0faa0-03b7-42b7-b539-78c0ab9459b4/58644420390.pdfIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_2311b8b975394f3e9125798106e5b00c.pdf?index=trueIn PDF document text
    • http://pigutun.myartsonline.com/transformers_revenge_of_the_fallen_optimus_prime_comes_back_to_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcaec8f9-6352-46df-80ac-38edd9b5917c/large_dolls_house_furniture_set_bundle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0515ed87-3fc7-481e-af6b-6006abd7257a/dell_optiplex_390_lan_driver_for_windows_7_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/21356638106.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_88fcaa5d31af42608e8b38ae44c67a24.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/impossible_burger_nutrition_information_burger_king.pdfIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_a384c5b5790645bf85262d138f1a465f.pdf?index=trueIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_72fc52c666da4bd39d21e7d843041519.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/jamimolujanugexowunuwemis.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/dazikukuri.pdfIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FD 5140 bytes
SHA-256: 2471075b424c6dee9d19cfd7b090ce0cfc3bbf75ee34bf30f3427833070fe351
font_01_sfnt_off0000f689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF689 5032 bytes
SHA-256: a52f394870e94801918d66ec0bfc7cc7593fac770556c62416af7b3fb8c5697e
font_02_sfnt_off000108c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C3 11716 bytes
SHA-256: 89265104d57e03dda1f1b647efaef38055c46b182c82462cee080b741540be21
font_03_sfnt_off000130e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E1 16544 bytes
SHA-256: 49230a07578f2a0b108554ff1d47b1cb24b8f8081254bad551c0ce72ea05e0a5