Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa62347c49d42e5…

MALICIOUS

PDF

59.2 KB Created: 2020-12-11 09:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 389a1b9ac2a0408963b9469ada4a32a2 SHA-1: d0657d5ad43aaa5c431a71953bec9c8422418cd2 SHA-256: 8fa62347c49d42e508041df88045861c6ba1de6c46ab91bf3952c5e09111d492
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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 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.
  • 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://traffking.ru/strik?utm_term=bayer+advanced+season+long+weed+control+sds PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383452/normal_5fba6d3915728.pdfIn PDF document text
    • https://gomigara.weebly.com/uploads/1/3/4/7/134727279/gijirurizumimek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469116/normal_5fd1c4a92f1b9.pdfIn PDF document text
    • https://vatalinonabalix.weebly.com/uploads/1/3/4/2/134234662/fuxosinomobefiret.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/42346.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/584a278d-fc0e-4c85-bac3-076a3df1fd1a/unit_vi_worksheet_2_answers_physics.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a694bdb33045eee292d1/t/5fca9c9a87ceb843bde26d2e/1607113886116/how_to_play_mahjong_solitaire_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf1a82edfcd2bda9071da/1606218152683/87892505667.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5203dc30a162e0c6de521/t/5fcd1f04d235d37878cd25a8/1607278341909/how_to_make_crystal_slime.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc726358651a0475196622d/t/5fcae2f8a0b42e35669cb1b2/1607131897228/family_guy_the_quest_for_stuff_hack_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd038479c08c7f2b9fd34c/1606222725195/moonlight_sonata_sheet_music_imslp.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_off0000aaaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAAF 5412 bytes
SHA-256: 8228c74bd9986eb94a3196ea8f75fb31d99a734f625b1ed95498ac97289b0893
font_01_sfnt_off0000bd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD42 10144 bytes
SHA-256: 1328ade3aab2d117811b3475ddf8eee13bede2a5c2778587d8ed82623f8b2391

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