Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1a3e7e885054a1…

MALICIOUS

PDF

88.6 KB Created: 2021-02-12 12:49:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 054b5a4ba4a553269a238cbec0680785 SHA-1: 266daf0ddbb5141ac5bc8db3c254fbcbc76407f1 SHA-256: 5d1a3e7e885054a13c230f4d28e209e0a159653570d02e8c10f27b3b1313b33c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting an attempt to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through the embedded URLs.

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://jacksth.ru/123?utm_term=airsep+portable+oxygen+concentrator+manual PDF link annotation
    • http://trokot-online.xyz/arithmetic_progression_questions_and_answers_class_10i1b4n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_601b2a0b800b3.pdfIn PDF document text
    • http://my-favshopc.online/chalo_2018_telugu_movie_english_subtitlesldtgu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369494/normal_5ff8d7e365a6c.pdfIn PDF document text
    • http://tourist.fish/58186633576t0u3o.pdfIn PDF document text
    • https://fikijumosoliz.weebly.com/uploads/1/3/5/4/135400707/wuwuzafajofar-gisekowav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463809/normal_5fd2cda9339a3.pdfIn PDF document text
    • https://nokafixawawi.weebly.com/uploads/1/3/1/6/131606940/98074f3e7.pdfIn PDF document text
    • http://b0xberry.online/crossword_puzzle_maker_in_englishtbkf6.pdfIn PDF document text
    • https://venunuwaxel.weebly.com/uploads/1/3/2/7/132740799/81475f991.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488346/normal_5ffb89e512e01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pilazi/fipenixebisetapamodepejap.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/12028867674.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/elder_scrolls_online_bloodroot_forge_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/hungarian_dance_guitar_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/boss_rc_300_manual_franais.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/24104800964.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/73909501501.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/86775794360.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE201 13268 bytes
SHA-256: 09b93d2846caa499d4002b8797cc390b5ae77d7eb0d53691a1b1b895cab5ea72
font_01_sfnt_off00010cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD4 5436 bytes
SHA-256: f34d3f2ed21091110cb8967a39658f76c502de2b9a7170dd46fae4a73e2f1743
font_02_sfnt_off00011f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3A 10800 bytes
SHA-256: 8e762e9625ddce80a91649dc7501da5be2eb834fd53938b0b43c7e62db869021
font_03_sfnt_off000143cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143CD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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