Malicious PDF — malware analysis report

Static analysis result for SHA-256 54cc82dfa962d4ca…

MALICIOUS

PDF

78.5 KB Created: 2021-05-01 20:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0a8f33872d9324c88c21be6ffcc51468 SHA-1: 8bb918256c35f6ee3a51ee3b87a562155aa45aa9 SHA-256: 54cc82dfa962d4cac7b50ecc8396fb504876a3cf1fbab05a22a633fd35f0c159
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/strik?utm_term=d-link+dir-890l+latest+firmware PDF link annotation
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/suveto.pdfIn PDF document text
    • http://befigter.xyz/starboard_value_presentationjygtp.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/jemhgha/57784067123.pdfIn PDF document text
    • http://bigwin-1xbet.fun/49327952948olmyj.pdfIn PDF document text
    • https://rakafofolobe.weebly.com/uploads/1/3/4/6/134649319/8578036.pdfIn PDF document text
    • http://shmelev.pro/un_papillon_dans_la_citej1cep.pdfIn PDF document text
    • http://reduslimitalia-official.site/52393462359b3abl.pdfIn PDF document text
    • https://makaxifosezopuv.weebly.com/uploads/1/3/4/5/134511124/netugoladuwajawiw.pdfIn PDF document text
    • https://zikamesezelili.weebly.com/uploads/1/3/4/8/134857079/mifirozigulox.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/jebep.pdfIn PDF document text
    • http://instapriz.site/lovely_cat_picturesjjemk.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/jiejf7z/jivobiromazi.pdfIn PDF document text
    • http://forecast.bet/79792752215en5hk.pdfIn PDF document text
    • http://itdiscount.info/moviedroid_apk_for_pc43i00.pdfIn PDF document text
    • http://present-mag.ru/fimawenoxirrdbg.pdfIn PDF document text
    • http://pay-order.info/tejusoganirigesomubsijjk.pdfIn PDF document text
    • http://habirovradik.ru/2020_club_car_onward_dash_kit1d5pc.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/gjethjE/stickman_downhill_motocross_mod.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://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_553576a63f184900976198c1acaf5108.pdf?index=trueIn PDF document text
    • https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_0f9d0ad058ea4023ad2a1503bc62c1e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/badodemebo/caldera_forms_problem.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_4099da90cc06475b85468291b5890110.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/43793584582.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE490 5412 bytes
SHA-256: 02ec8fd1cc4ab87197ee0ee4b19aa621b74d6f59ed275398675e1773b49eea93
font_01_sfnt_off0000f6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E4 11592 bytes
SHA-256: bb8187493872502228a0514be252babb43231f90cb784e419b6a0dbe4c078070
font_02_sfnt_off00011e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378