Malicious PDF — malware analysis report

Static analysis result for SHA-256 45b4013206ec14b9…

MALICIOUS

PDF

78.5 KB Created: 2021-04-05 05:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e53a01dc0eff8378f84de7edb1bb516e SHA-1: bfc56cb39559e9a8fdfa8235c2cc5d5946133147 SHA-256: 45b4013206ec14b96c047c6f8ad11f2a4b1ed0cc253422539e4ffb23c1b3c44c
226 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a link farm and potential phishing lure. It contains numerous external URLs, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates a common tactic to bypass gateway scanning by instructing users to decrypt a payload, though no explicit password instructions were found in the provided document body.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • 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 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pelibifir.ru/award?keyword=reactivity+of+aldehydes+and+ketones+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415951/normal_5fe87aee2c780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_6066fb6d5b31b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5fe8951f4926d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_6064f02f70d3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_604307dfa3eaf.pdfIn PDF document text
    • http://pay-order.info/murderous_pursuits_gameplay_espanol78hh6.pdfIn PDF document text
    • http://free-at.pro/xizafejalimexugdixxs.pdfIn PDF document text
    • https://losiweso.weebly.com/uploads/1/3/1/3/131380476/1629344.pdfIn PDF document text
    • http://repochka.site/arrival_meditation_script6jd42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392661/normal_5fe599fd71e6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489846/normal_600f4f9885477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421787/normal_60641f1d16ae2.pdfIn PDF document text
    • https://roxejozojone.weebly.com/uploads/1/3/0/9/130969259/bowoxafulef.pdfIn PDF document text
    • https://likuwiwekadu.weebly.com/uploads/1/3/1/8/131857000/57e2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460251/normal_602cb4f9d0f50.pdfIn PDF document text
    • https://kuvobawodamelis.weebly.com/uploads/1/3/5/3/135350379/pegibuxabi-xaxata-nenegaxegabuk.pdfIn PDF document text
    • https://kanudepu.weebly.com/uploads/1/3/2/7/132740929/watoz_lakigupixexaja.pdfIn PDF document text
    • http://edevletorg.com/1978_john_deere_316_service_manualidzwe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375200/normal_5ff7760a46c78.pdfIn PDF document text
    • http://kyukty68.xyz/moped_repair_shops_near_meoobwm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d6477b75-8e4d-4453-8bbc-a86a6009e57c.filesusr.com/ugd/261d41_080ef27c250249599e34770adc90e059.pdf?index=trueIn PDF document text
    • http://zojujuz.rf.gd/5259398544.pdfIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_df9a420c5d1d43429c86b47cd51e1346.pdf?index=trueIn PDF document text
    • http://fifowofuzapuzo.epizy.com/vupudilebufakitoxu.pdfIn PDF document text
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_2c5f86bd0178415b9ced60f55a93ce9a.pdf?index=trueIn PDF document text
    • http://rinalixuli.rf.gd/vejifafixekusejokax.pdfIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_5793e436da13460cb2fcd862da5e8deb.pdf?index=trueIn 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_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 5380 bytes
SHA-256: 1f425418e8342dc255bd87d7a5c6e90699a96a6d395c2cc3f431f3d936983691
font_01_sfnt_off000102e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E6 11576 bytes
SHA-256: 2a786a54f742f75bcc519f612d129d4806f6f14d53bba5338c2e22372cc4182e

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