Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc5c0ba4df65caf…

MALICIOUS

PDF

83.6 KB Created: 2021-04-30 19:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d0a26df56c42544d0d75e68b62da701f SHA-1: 68f588bfb13f823ea2cb295b87df93979dd31ebe SHA-256: 3fc5c0ba4df65cafaa0e9d6fa6c677174d8d095774a28da7fc7a4b3d618b96ac
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed for SEO manipulation. It contains numerous external links, including one pointing to `https://ponafet.ru/strik?utm_term=dollar+general+employee+transfer+policy`, suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, appears to contain text related to employee policies, likely a pretext to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=dollar+general+employee+transfer+policy PDF link annotation
    • https://cdn.sqhk.co/vixonafom/RKia4J0/dingus_magees_statesboro_georgia.pdfIn PDF document text
    • http://siderevakeforu.22web.org/tinan.pdfIn PDF document text
    • https://cdn.sqhk.co/zugeketinog/jijhhgo/classic_wow_tailoring_power_leveling_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/fokivetezabu/wFhikgc/98284555688.pdfIn PDF document text
    • https://cdn.sqhk.co/mugetawelumi/gehbhh9/71973170439.pdfIn PDF document text
    • https://cdn.sqhk.co/fisejadiruw/Qhfudjc/xifosed.pdfIn PDF document text
    • https://cdn.sqhk.co/vorinugobol/jhhcigD/fagilukilurexokasif.pdfIn PDF document text
    • http://mefuban.iblogger.org/andrei_tarkovsky_mirror.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxafopagad/XigT5ha/school_business_manager_jobs_london.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9624c249-48c8-4bca-900e-e2436eea8bc5/the_exorcist_2000.pdfIn PDF document text
    • http://rizokimom.epizy.com/loxazevukadotazikabubetus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aa3bfcc-6445-4b59-ad85-8b5d615c39b9/garmin_etrex_30_gps_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d574b09c-f78d-4cba-81ca-073b884994e0/operating_system_concepts_9th_edition_chapter_3_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53eaedc-3636-421d-aeb6-aa066ae6af78/lodubum.pdfIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_c3ba3a9e70f54560969c3801ea0e4fc3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c2728e8-31cf-4fa5-a457-bb6cd5488565/what_is_the_preamble_of_the_philippine_constitution.pdfIn PDF document text
    • https://2c91b947-1dd8-401e-ae91-d595f2f75867.filesusr.com/ugd/0af078_b9bff2257e054c05af4379061dcec98a.pdf?index=trueIn PDF document text
    • http://sesoxevanadike.epizy.com/call_of_duty_android_obb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5322f420-2502-4b2f-9494-b6c75280a58e/womorafifijuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28eb040b-cb50-488d-a159-c4f871d5d276/66842657615.pdfIn PDF document text
    • http://katemezutam.rf.gd/alveoloplastia_articulos.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF385 5436 bytes
SHA-256: 28888f42145b27ca41faba8c7217031c5185bcad1621cbe50a66c3f2f9dcfd44
font_01_sfnt_off00010609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10609 11064 bytes
SHA-256: 4cb7298b447b24c5a89cbeeea7ab721b8893f247b49ec2476b9937d2eed4b9e8
font_02_sfnt_off00012c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C26 16060 bytes
SHA-256: f282a66e2001cf26e1194ff3a6a5d6a2521d0b41b787ba2fbe446ec9f6c3aaa6

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