Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc774f77bb7dff41…

MALICIOUS

PDF

81.2 KB Created: 2021-03-27 10:14:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 35372d4fca7a0873145bfacac7e5208b SHA-1: 50e2fd857e7c1771ec8509598b288b857f92e511 SHA-256: bc774f77bb7dff414faea3ea096ded258980f9eca22703c77242591b8f3904b4
194 Risk Score

Malware Insights

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

This PDF document contains numerous external links, a common tactic for SEO link farms and phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's content, though obfuscated, appears to be a lure for a topic, likely to encourage clicks on the embedded URLs, which are numerous and spread across various disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=la+historia+de+la+quimica+resumen PDF link annotation
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/575d8bf80a75.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/lejewenafuzageguned.pdfIn PDF document text
    • https://waramexebogod.weebly.com/uploads/1/3/1/8/131856917/zozok-sitexonarigoker-xikekobopunop-wasoj.pdfIn PDF document text
    • https://wutaleba.weebly.com/uploads/1/3/5/3/135390467/gitejoxova_gekovug_vojotelidex.pdfIn PDF document text
    • http://fasoxuxesatilu.sportsontheweb.net/85128950023.pdfIn PDF document text
    • https://vitovoraf.weebly.com/uploads/1/3/1/1/131164311/zeleveredumud.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/ximozilovebedaxa.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/cgp_functional_skills_english_level_1.pdfIn PDF document text
    • https://dozunetad.weebly.com/uploads/1/3/4/4/134472758/rejuzoduvilor.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/bibupeju.pdfIn PDF document text
    • https://bamupenasod.weebly.com/uploads/1/3/1/4/131410012/40d7d18b9f.pdfIn PDF document text
    • https://ranenowubugipo.weebly.com/uploads/1/3/4/0/134040983/zemikijaxa.pdfIn PDF document text
    • https://dapunilak.weebly.com/uploads/1/3/4/5/134506399/2347026.pdfIn PDF document text
    • https://zenamuvevabun.weebly.com/uploads/1/3/1/4/131453902/wedifakak.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/20199221047.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://donijexufenu.onlinewebshop.net/97041062789.pdfIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_221ba77895b2476b9993dc394c30b809.pdf?index=trueIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_82a5b9f42f2742eaa3eb3e4484837060.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b15963e-1305-4abc-8518-fe5d33ec8dc7/nemevuwekulunelazifa.pdfIn PDF document text
    • https://6c639bf1-704a-4500-b661-329758898742.filesusr.com/ugd/02d620_4548fbcb261749b2b5d9c366d8550e28.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b168a3f1-93ef-443c-b63a-3eeb60476b5e/22982883211.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_off0000f1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B4 5128 bytes
SHA-256: a4af111c0bbe5ed889494d7c58f75c4eb350f338377842df8724b4e58a2eb8f6
font_01_sfnt_off000102f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F8 11312 bytes
SHA-256: c47633bc57bbb01b75aaee752ffc746754006a3527214e6e0f40cf89f92ac6a2
font_02_sfnt_off00012788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12788 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.