Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68cb7f97fd625f2…

MALICIOUS

PDF

77.5 KB Created: 2021-06-13 01:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bc95baaa510dbe786d4a9a80f0f7cb13 SHA-1: b44c6b9c08ca09a4511f876531b82c969b0611fa SHA-256: b68cb7f97fd625f20005a1d1b4ec87f0f14a9d2ce5d0cfb8fa23f8fc556a7881
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://seumenha.ru/123?utm_term=silk+thread+bangles+images++free PDF link annotation
    • https://widawukilifuduz.weebly.com/uploads/1/3/5/3/135398171/papipajitobuwuf_zividotil.pdfIn PDF document text
    • https://nekarima.weebly.com/uploads/1/3/4/8/134876173/e3140.pdfIn PDF document text
    • https://zegijavevezedoj.weebly.com/uploads/1/3/4/3/134309525/gipibimo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_60255b67d2afd.pdfIn PDF document text
    • https://pesaladijij.weebly.com/uploads/1/3/1/3/131382382/xutuxuguguvasa.pdfIn PDF document text
    • https://vivutavolid.weebly.com/uploads/1/3/4/3/134308799/b86727836.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494452/normal_5fcb33bc404d7.pdfIn PDF document text
    • https://vokinojen.weebly.com/uploads/1/3/4/8/134851280/zerabirap_jipubufudovawaf_nusivaxun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388160/normal_5fd75079c24ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_605137ae4e685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_60645abc80487.pdfIn PDF document text
    • https://powagexufofuw.weebly.com/uploads/1/3/4/7/134748875/siforadisezazu.pdfIn PDF document text
    • https://milanesove.weebly.com/uploads/1/3/1/3/131383497/xonuruzakarogi.pdfIn PDF document text
    • https://gajitiromivalot.weebly.com/uploads/1/3/4/4/134475956/7fe245d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://razodegotit.pbworks.com/f/tegujofafokodapaxapetem.pdfIn PDF document text
    • http://lururefisu.pbworks.com/w/file/fetch/144560373/23923419787.pdfIn PDF document text
    • http://dateromitu.pbworks.com/w/file/fetch/145041048/xidojijiruxadibimotodad.pdfIn PDF document text
    • http://jitilabajeko.pbworks.com/w/file/fetch/144527535/83745374372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a5057de-8649-40d5-9e2e-076ef3377514/74118526466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08cda3aa-1289-4e9c-afbd-2e24638b8dd2/wekazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8f6a67-cf2c-4655-b8fd-f349c1750509/biblia_hebrea_gratis.pdfIn PDF document text
    • http://tarogifere.pbworks.com/f/jabra_75t_one_side_not_working.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DF 5628 bytes
SHA-256: 31660105968eedadcf0e0f815ce4f1c8debc9a42334509ee168111b17aa9a9fa
font_01_sfnt_off000105d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D6 10172 bytes
SHA-256: 054786b0b57f166a7055fbda7866d44194449184a0c600debea0cc271cda737a

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