Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f211d64606016c9…

MALICIOUS

PDF

72.2 KB Created: 2021-06-05 18:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2287c19d778228a1a84b8d81ab1a7449 SHA-1: df9e9de1bfb6304f5361e89a47fc0a1bda5f6a74 SHA-256: 6f211d64606016c987301b4a527860a9fed846dfac101b6648580d2bc8c96bb0
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/123?utm_term=bestwap+love+status+video PDF link annotation
    • https://bagamijak.weebly.com/uploads/1/3/1/3/131380043/lowexude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_6017024ed5dac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480899/normal_5ffefad70c5ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463005/normal_5fd0f0870d748.pdfIn PDF document text
    • https://wudowesowuzoka.weebly.com/uploads/1/3/4/5/134584143/6e22466c7c187f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414152/normal_5fda786153042.pdfIn PDF document text
    • https://wobafelu.weebly.com/uploads/1/3/4/6/134613510/ededbcc2.pdfIn PDF document text
    • https://xotikavetaj.weebly.com/uploads/1/3/4/8/134861849/ziwanalatiduga.pdfIn PDF document text
    • https://mapilezije.weebly.com/uploads/1/3/5/3/135322213/kadojegemesin.pdfIn PDF document text
    • https://zazobowelukoki.weebly.com/uploads/1/3/0/9/130969428/meledorag.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/9836f476-cf0e-4fab-9bce-9405c20c68b9/dell_2407wfp_card_reader_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ef36ce-33a2-41be-b1f2-97cc96485012/70763255027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58ec7374-9c84-41f5-be84-8f99d7f0caaf/64144004405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece81d17-2e8a-4711-b6e3-bd2924375575/zedewuputoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3159f85-29b5-4bf3-9788-16b174ded3cc/25700314102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07daeaa4-e468-4996-b4cd-57905c6a7d1c/disney_look_like_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2189aab5-0c0c-4da1-8d6c-62d7a949e7d2/lumedilowal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa6aea0-1b42-45ed-aee1-d5557dc7b08d/58744843247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4be5af4-ca52-4c8d-89fc-b292aa7bea75/75104224737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a91e8c-d8e6-4648-ac05-ef6be0e03c4e/29462726082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cfd1df8-a4b9-4ba9-87b9-ac02d63bbe88/justinguitar_practical_music_theory_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c1e6ec7-f92a-4b58-ae3f-e206f5d2a7b7/28821474106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40a63d7b-04d0-4e18-a62b-2c1430e5af95/what_does_1_10_n_30_mean_in_accounting.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_off0000e050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE050 5056 bytes
SHA-256: a6f41762f10a9092af20ee1dd8f781cc6d5bf56e84c0c18223572753cc02dbfb
font_01_sfnt_off0000f1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AF 9996 bytes
SHA-256: 6ba971972163762d2d10cf475e95e2c2ef5062805b6c54005d5079375f4c3e1a