Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f78b5f28e77b97…

MALICIOUS

PDF

70.0 KB Created: 2021-04-28 19:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b0577fe247633b04443cdb72de58f899 SHA-1: 2a7a49a9a0bd17e247bc7d041a23b280cfcb77fb SHA-256: 20f78b5f28e77b97be4349e9b554e9514b8032ff04ac6a6176bbbb1c52428459
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a phishing or link-farming operation. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a link farm on disposable hosting, likely to distribute malicious content or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=craftsman+yt3000+mower+deck PDF link annotation
    • http://subbellassecret.com/197916121907was6.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/i3KJ3je/buraf.pdfIn PDF document text
    • https://cdn.sqhk.co/fetebutujo/icrhaje/64526529778.pdfIn PDF document text
    • http://reduslim-italy.site/que_hace_un_lider_positivojmu87.pdfIn PDF document text
    • http://leoidet.xyz/how_to_fix_a_broken_snark_tunerp2xay.pdfIn PDF document text
    • http://itverys.space/bisotazudepodijdp53.pdfIn PDF document text
    • http://medyayazilimtr.com/cas_lp-1000_troubleshooting60pbs.pdfIn PDF document text
    • https://cdn.sqhk.co/dewobube/mKCDTic/the_new_york_times_subscription.pdfIn PDF document text
    • http://price-list.moscow/dirt_devil_easy_lite_owners_manualkyh1b.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/mcdougal_littell_algebra_2_practice_workbook_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/eFgjYxH/hidden_objects_mystery_tales.pdfIn PDF document text
    • http://stebsmeh.space/8813376448385on9.pdfIn PDF document text
    • http://nuwojukow.mygamesonline.org/canon_speedlite_430ex_ii.pdfIn PDF document text
    • https://cdn.sqhk.co/doparibi/7BLjewd/tubexajiwuxotakufolawepik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_24d36e4b77d647c39d4ef4abc0d5e6d0.pdf?index=trueIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_e6a09677028d42e8bd0bba0520093394.pdf?index=trueIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_68e17d5383ee47b7b14fc192ee0f6587.pdf?index=trueIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_fd798b847aa5462d96def7a7a1390071.pdf?index=trueIn PDF document text
    • https://245ae9ba-e923-43ed-bc11-30ed5d1acd78.filesusr.com/ugd/051519_ff4f210f5c8245f1973dd0c9b3962970.pdf?index=trueIn PDF document text
    • http://redifigikutusoj.myartsonline.com/brucellosis_oie.pdfIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_514d560deb214f78b1a176b4368ea37c.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27D 5604 bytes
SHA-256: 00129ec17c59c220400649d8871c74701f7d856959ea388776d90bdc0981477b
font_01_sfnt_off0000e58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58E 10960 bytes
SHA-256: 183fd6ad20d753a1f6a181400969b42e01f72c1a5cf68efa751b614071559d7e

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