Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb7bd15e070a926…

MALICIOUS

PDF

69.6 KB Created: 2021-03-10 20:10:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02a540741b5eb8bd597ab1ce5214af35 SHA-1: b8f22bff1ab4b2cfdaf101b20d7304c0fd089814 SHA-256: bfb7bd15e070a92601ae0f19f16c019efa259839f8297a6ca723c2d7d4b61330
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or SEO spam operation. One prominent URL, 'https://resalured.ru/aws?utm_term=first+6+cube+numbers+answers', is directly embedded and likely serves as the primary lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8294

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://resalured.ru/aws?utm_term=first+6+cube+numbers+answers
    • https://cdn-cms.f-static.net/uploads/4469827/normal_601e706aca42f.pdf
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/maxowepobig.pdf
    • http://yarrebitteh.online/66139229497d4hwg.pdf
    • https://cdn-cms.f-static.net/uploads/4401519/normal_603eb6a9c55f2.pdf
    • https://bamewubi.weebly.com/uploads/1/3/2/3/132303354/dikoxibujerigix.pdf
    • http://copyright-rules-help.com/tactical_submission_ada_maria_sotolw4h5.pdf
    • https://dukagalirizaz.weebly.com/uploads/1/3/1/8/131856141/sofizitotarotizuji.pdf
    • http://all-system7.work/wulazegigozeboguwkgz9q.pdf
    • https://cdn-cms.f-static.net/uploads/4415527/normal_603618aaf30b8.pdf
    • https://xofudafitigo.weebly.com/uploads/1/3/5/3/135327781/bakofekojesu.pdf
    • https://cdn-cms.f-static.net/uploads/4403822/normal_5fd11cc3219ee.pdf
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5feb72ab6483f.pdf
    • http://jizerigozigalav.getenjoyment.net/badger_100_garbage_disposal_reset.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/34daaec6-31d3-4150-9552-ea1f39011803/77653130875.pdf
    • https://uploads.strikinglycdn.com/files/41095a5f-4d42-48f5-902a-3826f1ae1fe7/how_to_apply_gentle_leader_collar.pdf
    • https://uploads.strikinglycdn.com/files/edd6f1f7-65bb-4e1b-b0d7-b131d29651ed/bikini_body_guide_2.0_free_download.pdf
    • https://uploads.strikinglycdn.com/files/fb3130e1-e63c-4157-99f4-eb921368bdee/why_is_my_transmission_not_engaging.pdf
    • http://vesedakowata.onlinewebshop.net/casio_g_shock_ga_1000_strap.pdf
    • https://uploads.strikinglycdn.com/files/8f3a0e29-ba13-4f67-9563-5517f11f5ba2/79904911316.pdf
    • https://uploads.strikinglycdn.com/files/89322cdf-7cda-4cf7-850e-fd6f8af9044f/vishnu_sahasranama_malayalam.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e81d.bin
95e207c55a2ce6ee71016d40a4653164fbec0bb482fb002dd6a827461970bef2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE81D 5256 bytes