Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a63d571262fac83…

MALICIOUS

PDF

85.3 KB Created: 2021-03-17 01:29:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d31e2eae949b77248955302cc566e004 SHA-1: 5c561547cf0db2ab22cb5056171653bd88a1612a SHA-256: 3a63d571262fac834f495790ac26374cedfff1126d0bdcfeb6e7a1128a83bc1c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://botokaw.ru/strik?utm_term=gigabyte+ga-x58a-ud3r+manual PDF link annotation
    • http://copyright-help-center.com/19199855010xk5le.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/i_want_to_convert_to_word_file_online.pdfIn PDF document text
    • https://losasogewago.weebly.com/uploads/1/3/1/4/131437886/18513a14f.pdfIn PDF document text
    • http://flipping-car.online/monster_prom_pr_agentk5rg6.pdfIn PDF document text
    • https://vukezozonobobex.weebly.com/uploads/1/3/1/3/131383599/40511ff85.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/dulilewemidixiyc4ej.pdfIn PDF document text
    • https://fubofekibodubeb.weebly.com/uploads/1/3/4/4/134483790/wakes.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/jiFqjiJ/full_size_carx_drift_racing_2.pdfIn PDF document text
    • http://saduzemed.mypressonline.com/voxafipavumipowikixe.pdfIn PDF document text
    • https://gidixelasulam.weebly.com/uploads/1/3/0/7/130739099/1027871.pdfIn PDF document text
    • https://kasipuxatupar.weebly.com/uploads/1/3/5/9/135966953/c8a38ce8.pdfIn PDF document text
    • https://cdn.sqhk.co/ronelejibir/duxshcb/rofepebuzekusetara.pdfIn PDF document text
    • https://levevozupub.weebly.com/uploads/1/3/1/4/131407214/xarigipawugeren_lupafamazifow_jusafus.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/b15cca3b-9df3-42c6-8c29-34405e367ae9/dr_dre_solo_pro_headphones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f953c94c-49cc-4328-ac98-a310fa8bccef/parosugunaxalotak.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_off0000f819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF819 5820 bytes
SHA-256: c9250c2315b6f3bb8b653af3995447a6d1bf143db52e39a0847d447edf7f0860
font_01_sfnt_off00010be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE8 11288 bytes
SHA-256: b6e37a855bc111bcee2c7d0b477ddb7b788dfddbf582fb82f3036427fd064fd1
font_02_sfnt_off00013287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13287 16260 bytes
SHA-256: d25a34a56be33791b66bd7dbe91ee772b39b89bee75ba0e64ef3ea6cb2c10b57

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