Malicious PDF — malware analysis report

Static analysis result for SHA-256 9707d60616acf583…

MALICIOUS

PDF

76.2 KB Created: 2021-06-11 06:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c2b331ac03b2ac91cf46168b221d0a24 SHA-1: ce4fd2d89891604fec39cf34f4fdab5f10f6b692 SHA-256: 9707d60616acf583f442d4ff46c46474890710c6f16652ca4d15466eb4eb38b1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary URL pointing to a site offering software downloads, which is a common lure for phishing or malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. Although no scripts were explicitly extracted, the nature of the embedded URLs and the ML classifier output suggest it's designed to redirect users to malicious content.

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 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://drafthe.ru/pbw?utm_term=free+vidmate+download+old+version PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411245/normal_604dd126a7cf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482882/normal_60667a778c496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404113/normal_605d4a3d901f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472753/normal_5feb5277e8321.pdfIn PDF document text
    • https://zimuwinosozenuj.weebly.com/uploads/1/3/0/7/130740464/xutarinedivu_gegakodavo.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4412592/normal_60b4895943ed4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_606b73de1de9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410186/normal_5ff36b0273e2a.pdfIn PDF document text
    • https://bimufoju.weebly.com/uploads/1/3/4/3/134311804/vesetexexijo_nujijegod_wurumuna_dizuluf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460055/normal_6057b7bfecaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5fdb6c54205bf.pdfIn PDF document text
    • https://togoxijagujeg.weebly.com/uploads/1/3/0/7/130775712/00de4eb870.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411931/normal_5fffafa11b042.pdfIn PDF document text
    • https://jugikezifu.weebly.com/uploads/1/3/4/6/134654678/c2fd01576c1.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
    • http://bomasasawavi.pbworks.com/w/file/fetch/144944436/vorojitipow.pdfIn PDF document text
    • http://betifufato.pbworks.com/f/how_to_trigger_dad_bot_discord.pdfIn PDF document text
    • http://veputuvus.pbworks.com/f/wondershare_filmora_license_key_and_email.pdfIn PDF document text
    • http://pezaloribed.pbworks.com/w/file/fetch/144628980/rarenekovokixonepazig.pdfIn PDF document text
    • http://movovepavuzi.pbworks.com/f/zasoxiwejinokimomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e75b3e0-4a02-4f2f-ae97-178b6e3e4af6/lefuninofipilozajegafaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e090d8e8-ba6c-4601-af26-77e14b9b7efb/why_does_my_thermostat_keep_shutting_off.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_off0000e015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE015 4868 bytes
SHA-256: 0a0968f265d7b0ec67ccc4543ba894076df3e0328c04097486097834b7894d64
font_01_sfnt_off0000f091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF091 10740 bytes
SHA-256: 3f65bbe761ddea33d856cb813a10e2b83f8517a839a71485393b0c7df16bebba
font_02_sfnt_off00011519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11519 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176