Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f671a28fd1be5de…

MALICIOUS

PDF

81.7 KB Created: 2021-05-18 12:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d96f56b9de4597d2a9ccffb0a5682488 SHA-1: 4ab2fb5b927f57737c98765a1619a3a3c204d449 SHA-256: 1f671a28fd1be5dee2ded479f5724e06400ab36870c61cdefd267e434124953d
156 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, with critical heuristics indicating it's part of a link farm. It contains numerous external links, with a primary URL pointing to a suspicious domain and a secondary URL leading to a PDF file within a Weebly subdomain, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains metadata related to its generation, but no direct scripting was found.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://lozipotod.ru/strik?utm_term=how+to+measure+turning+radius+of+a+truck PDF link annotation
    • https://fizilotot.weebly.com/uploads/1/3/6/0/136050642/riviko.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/e81cd57d57e343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_602cd6d985777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446642/normal_602733b63a4fe.pdfIn PDF document text
    • http://zakukat.iblogger.org/fable_the_lost_chapters_demon_doors_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415326/normal_603ef97c7d962.pdfIn PDF document text
    • https://fepobewute.weebly.com/uploads/1/3/5/3/135386667/ca5e84867ede6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483851/normal_6011712fd8d2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404113/normal_5fe430db1e97d.pdfIn PDF document text
    • https://vizodifoberesin.weebly.com/uploads/1/3/4/9/134900429/4308cb7de1ccc.pdfIn PDF document text
    • http://fozixozag.iblogger.org/dejasozujuja.pdfIn PDF document text
    • https://warogowi.weebly.com/uploads/1/3/1/6/131606132/junofajekekusu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/wumojatinupuw.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/kibamakiwataxi.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/mulavonijanupo.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/18645433296.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/51269456806.pdfIn PDF document text
    • http://daforewepon.epizy.com/ata_chapters_and_subchapters.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/74901210551.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/how_s_your_family_doing_answer.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_off0000ed8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8E 5428 bytes
SHA-256: 336f20904cfe63c07b7f8a507816bad2a52676876c52443af13a0e114f926d2e
font_01_sfnt_off0000ffff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFF 10636 bytes
SHA-256: 2a0dba8054c7d5a81dd32c29124ab9572957bce293739610b141378aedfe1e98
font_02_sfnt_off00012474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12474 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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