Malicious PDF — malware analysis report

Static analysis result for SHA-256 be8a3d00d1838f5c…

MALICIOUS

PDF

73.5 KB Created: 2021-02-13 01:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b820493c2ae63d812035f2f8f9d1c772 SHA-1: 0b6a532994dbd86bb7131a1334fc83bd20fefe5c SHA-256: be8a3d00d1838f5cc2ae87fe53c8e9f11bf2f06f56d8700df5f870739d460311
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to distribute further malware or phishing content through these links. No scripts were extracted, but the structure points towards a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=leatherworking+ffxiv+guide PDF link annotation
    • https://tojawejememu.weebly.com/uploads/1/3/2/6/132682640/3437188.pdfIn PDF document text
    • https://gawokani.weebly.com/uploads/1/3/5/9/135993895/31078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451930/normal_6026fc1eeffed.pdfIn PDF document text
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/3394967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379736/normal_5fdaf3aa09e57.pdfIn PDF document text
    • https://dokebama.weebly.com/uploads/1/3/2/6/132681336/sexabeved.pdfIn PDF document text
    • https://semufukat.weebly.com/uploads/1/3/1/8/131857602/mezofure.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/jbXhhCh/restaurant_story_hack_generator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_6023d223b79e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482215/normal_5ff137271a210.pdfIn PDF document text
    • https://wadasazaba.weebly.com/uploads/1/3/3/9/133999184/lozujevozebav_lisepurepo.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/ggfhagc/inside_out_joy_sad_gif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411714/normal_6026589ecf30d.pdfIn PDF document text
    • https://zokilare.weebly.com/uploads/1/3/4/7/134767859/7175280.pdfIn PDF document text
    • https://xofajusas.weebly.com/uploads/1/3/1/0/131069744/d09b439.pdfIn PDF document text
    • https://cdn.sqhk.co/favejofu/bWbdZic/dowamelini.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE317 5184 bytes
SHA-256: 98a06380b67fe92955aea9a880dd798016824c05fc7946349df4f2d1d6d956e7
font_01_sfnt_off0000f4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DA 10616 bytes
SHA-256: 86fb1674c60a5d776a59aa51fa8ee5b0f0aac9a3f06d5f3cef487363209abdd3

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