Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5019bcbaf52b14…

MALICIOUS

PDF

94.6 KB Created: 2021-03-28 22:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 971d2f724ab26333c7a0e18704dddd55 SHA-1: 74c7aaeea3cec9916c0d34ab697968526e8768b4 SHA-256: 2c5019bcbaf52b1409d533d5c24862bf689fea5e2661ee3dc443b471f8ba4bf3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/wix?keyword=hp+probook+manual PDF link annotation
    • https://cdn.sqhk.co/kosifodalab/7UBTbCh/paper_io_3d_online_crazy_games.pdfIn PDF document text
    • https://cdn.sqhk.co/rolekixawute/H3icjJe/42350537089.pdfIn PDF document text
    • http://fikakutipid.mygamesonline.org/nebevazazoxofagarejor.pdfIn PDF document text
    • http://vifijes.22web.org/biwuzadufapegug.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/bamopikegijufetasowuxev.pdfIn PDF document text
    • https://cdn.sqhk.co/xurunesijud/iijbhfp/93176532189.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_52f11c20055d45bc9af984da4c4e4aae.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad763dd8-80fc-415d-a3bd-1c49f10d9551/what_is_another_word_for_making_progress.pdfIn PDF document text
    • http://xubejivulovitam.rf.gd/rapagofofutapijiradofi.pdfIn PDF document text
    • http://vidofebusezix.epizy.com/ketawirawoxelivesaxola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c29823e6-a889-4614-9567-e959dbbe6302/55421479876.pdfIn PDF document text
    • http://davinawoguzag.atwebpages.com/how_do_i_winterize_my_rv_water_heater.pdfIn PDF document text
    • http://takivozakafu.rf.gd/2556784507.pdfIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_45b7903cf6564f7f831e573ad6e7bd5d.pdf?index=trueIn PDF document text
    • http://jakowufa.epizy.com/boss_dr_550_mkii_review.pdfIn PDF document text
    • http://xetizeburekikat.rf.gd/66541725738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5116df7-a9f8-4e10-a2cf-22bca80f0cee/are_phobias_and_fears_the_same_thing.pdfIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_8023b1961f8242dbb8be1d77678fa983.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/df911458-462a-49c5-ab2d-ac708571c02c/mapebenisijataxi.pdfIn PDF document text
    • http://melaxodakeji.rf.gd/wuleliparaw.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13555 4952 bytes
SHA-256: b148bd4b5ecb487f89e663f63ef6f08e7848275695a5334d4d918199c25fdfe3
font_01_sfnt_off0001460f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1460F 12736 bytes
SHA-256: 1630a92767631a3d083effdeab2a4a4ff8a9c5007fb59542637d69a1e761c940

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