Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d301bda196db2c7…

MALICIOUS

PDF

81.1 KB Created: 2021-05-30 07:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a8f35968f5ca40861b73d9c9d50f65b3 SHA-1: eadaf2baa1ce7c086bdebb4bed078a703ef32937 SHA-256: 6d301bda196db2c7a49c8e9125aca12ca178e93aa2bb80d1114025233ccab777
186 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 and phishing sites. The embedded URL 'https://xajibur.ru/strik?utm_term=lacrosse+technology+atomic+time+instructions' suggests a lure to a potentially malicious website. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xajibur.ru/strik?utm_term=lacrosse+technology+atomic+time+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451549/normal_5fd7a1172e426.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485580/normal_5ff1491815542.pdfIn PDF document text
    • https://rekaxarekarefov.weebly.com/uploads/1/3/5/3/135300852/8325159.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/xuwerezigawi-mazoji-lazab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489979/normal_6060527897079.pdfIn PDF document text
    • https://sevizigetumopib.weebly.com/uploads/1/3/4/0/134042829/dozimogijakuwez.pdfIn PDF document text
    • https://veselamo.weebly.com/uploads/1/3/1/4/131452803/ditega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_6053c3a69905e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481671/normal_60592859eacda.pdfIn PDF document text
    • https://bovuxugiz.weebly.com/uploads/1/3/4/9/134901291/gedudidu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471475/normal_5ff4b5f404462.pdfIn PDF document text
    • https://zukinubugepar.weebly.com/uploads/1/3/4/5/134514864/9ec2e5f374.pdfIn PDF document text
    • https://peguduzivinaw.weebly.com/uploads/1/3/1/6/131606374/gesawibesumabaf_rukep_lurejukixomif.pdfIn PDF document text
    • https://xagajopudulu.weebly.com/uploads/1/3/4/6/134697977/28f0a9d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420589/normal_60136be84afce.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://uploads.strikinglycdn.com/files/e2f1483f-bf70-4464-ae16-d06c8316c77f/talking_tom_2_hack_mod_apk_download_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/836753b5-6d66-487b-93ea-4c908b6807c0/16784244267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b7c93ae-37eb-4afa-8066-833903b2f008/what_does_midnight_means_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b8a514-02ac-4802-a7e6-6a8fd81594e6/75482112388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ab38d8-eebe-43aa-a7d7-e5b12907aead/99990750937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71f2e4fd-1596-4731-b65a-6e6a763ab59d/87076747431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a9cbd3-b685-466e-b888-ad9e3a8c6c0b/how_to_print_head_alignment_canon_e470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6cfacf-828b-4c53-99a3-ab8b4253a952/sapixabovil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c32acff-a93c-4bbf-9628-dc477256faa8/vatinubalefowa.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_off0000f256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF256 5140 bytes
SHA-256: 1ebfa5a89ae9bd824c13f8f0511873d3d4e8f71bd819a6e4fc395ddd45108f1e
font_01_sfnt_off000103a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A4 10732 bytes
SHA-256: af9011eaeb522a4e548b98ed6cde59577b76e580602c99d4743d866a9c105326
font_02_sfnt_off0001283c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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