Malicious PDF — malware analysis report

Static analysis result for SHA-256 0222d5b30849c374…

MALICIOUS

PDF

81.2 KB Created: 2021-03-30 07:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00bd7e2ed61fad121c301f5f6537c1c1 SHA-1: 5e1c61637f3edcb65bd70b48b5135670653cdf86 SHA-256: 0222d5b30849c374a99862e56b99ec74fc7e472c7abe0c05ae2a2fc2a1f33ec2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, characteristic of a link farm or phishing lure, directing users to a suspicious domain. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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/strik?utm_term=excel+formulas+pdf+with+example+2010
    • https://cdn-cms.f-static.net/uploads/4481061/normal_5fe9eeb72c4b8.pdf
    • https://cdn-cms.f-static.net/uploads/4366645/normal_605f4fb5d48cf.pdf
    • https://cdn-cms.f-static.net/uploads/4497369/normal_601dc3b30f117.pdf
    • https://cdn-cms.f-static.net/uploads/4390323/normal_6013842c3130a.pdf
    • https://static.s123-cdn-static.com/uploads/4475197/normal_5fe488b2929ef.pdf
    • https://cdn-cms.f-static.net/uploads/4415334/normal_604d28f4c2eae.pdf
    • https://cdn-cms.f-static.net/uploads/4453551/normal_604ae7a3ae951.pdf
    • http://kutalevewomem.22web.org/plutarch_moralia_summary.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6f687ed2-79f4-4f5b-976e-eabf8d847865/book_review_debt_the_first_5000_years.pdf
    • http://mekidena.epizy.com/gizaleseg.pdf
    • http://bimemelal.epizy.com/93459764802.pdf
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_699dadcfebed43a89847f76dbb13bff4.pdf?index=true
    • https://677e6977-fc43-48b2-ac81-16e478c8573b.filesusr.com/ugd/3750c2_fc53405d885f4062a621e4c6882f31c8.pdf?index=true
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_b0cf56dfa9e7463ea4b27e3f598de054.pdf?index=true
    • https://9505ca4c-dfdc-4941-8fde-ded35496d0c9.filesusr.com/ugd/2097ab_b0fd7b05c02945b4bbee383e6d018261.pdf?index=true
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_42bee2b31f1f45c990bcfb7f2b202767.pdf?index=true
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_52c6cc4378324d8a80a1da7b1258d5a9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/36c73af9-55e2-4dbf-8580-3b67ae815825/what_is_management_operations.pdf
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_07f9f269ff8445c097b13bca9bc531ee.pdf?index=true
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_fcef140f15004b0db17f7db167e78fab.pdf?index=true
    • http://pubexet.rf.gd/tezadazituritofebu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa70.bin
0824e24d20d48fe04df9a901d909b08eb8d82482e6673035161ca0aaf1fd041d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA70 5836 bytes
font_01_sfnt_off00010e43.bin
01cbf0eb220756fc8f57adc01a73b96687bb29c8563a7e5c5bc3818fd23d3743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E43 12100 bytes

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