Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a2d8215e9152dd…

MALICIOUS

PDF

81.6 KB Created: 2021-04-05 17:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 74192ca6f5a6b9753e03281d120dc004 SHA-1: c4568594910d553b949176646b6dd8d657169860 SHA-256: e2a2d8215e9152dde0a55764441da971c5272fb9f9397c997ae0ff3249a66b74
186 Risk Score

Malware Insights

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

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 0.9990

Heuristics 6

  • 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 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://jacksth.ru/wix?keyword=dropping+acid+the+reflux+diet+cookbook+%2526+cure+pdf PDF link annotation
    • https://tikobivit.weebly.com/uploads/1/3/1/3/131382680/gafekotobepazagib.pdfIn PDF document text
    • https://bavipemafenun.weebly.com/uploads/1/3/1/3/131398101/396d38f60c414.pdfIn PDF document text
    • https://ruxabetuju.weebly.com/uploads/1/3/2/7/132740595/14a86da8ba6e3cf.pdfIn PDF document text
    • https://lozibojugor.weebly.com/uploads/1/3/1/0/131069840/ba0a54a5bb5a02.pdfIn PDF document text
    • http://vobarijijagurar.22web.org/google_adwords_fundamentals_study_guide.pdfIn PDF document text
    • https://subilitukufune.weebly.com/uploads/1/3/4/6/134629352/wadakebeveseju.pdfIn PDF document text
    • https://sowuwiwegekop.weebly.com/uploads/1/3/4/4/134444151/f4c006.pdfIn PDF document text
    • https://bipilebel.weebly.com/uploads/1/3/1/6/131606150/51b1a59fdfec2bc.pdfIn PDF document text
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/5015366.pdfIn PDF document text
    • https://tidevaxapoled.weebly.com/uploads/1/3/5/9/135971763/laxijukatowud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lamuzanumezaw.rf.gd/85121102960.pdfIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_c9622bd5c2994e2aa231ceba25175600.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/laradusa/nims_ics_300_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/1_tsp_butter_nutrition_information.pdfIn PDF document text
    • http://vedudide.rf.gd/badez.pdfIn PDF document text
    • http://tijekozevapika.epizy.com/sears_kenmore_sewing_machine_manual_model_5186.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/32977208621.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/livewire_ts_6.0_shift_on_the_fly.pdfIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_df7015cb187045babf196905f06bcd61.pdf?index=trueIn PDF document text
    • http://fevidubigozexa.rf.gd/baixar_contra_o_calvinismo.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_e5be893b7b0d4520b1ee648c0cb57902.pdf?index=trueIn PDF document text
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_f42265b0b24b46c6a08180cfcebe024b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vukusa/kolamisavukugesuzesutavo.pdfIn PDF document text
    • http://lometazojubusi.rf.gd/34872996412.pdfIn PDF document text
    • https://efed9c07-4553-4484-a419-1b844d271aeb.filesusr.com/ugd/6f475a_dbb74a4f2cff47e2bd20780f949ba2e7.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_off0001001d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001D 5512 bytes
SHA-256: 881c2518c67ac96d5f54d1bba3be0b2bed50977d1a8971865658539fa5e418f6
font_01_sfnt_off000112db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DB 10912 bytes
SHA-256: fe33e15a5ce853d93cf44b458ab24f50ffb705556b6fb00d7044bfaa7b5f3e54