Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61b033f332b684f…

MALICIOUS

PDF

106.0 KB Created: 2021-04-07 01:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e5ed7d07d95c5fea0b4749480dece464 SHA-1: 588ee3edd427be02e5ef467166619a67cf53e2ab SHA-256: a61b033f332b684f8feeee228ab926e2b870557455b4629325c572743c545d61
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dugedepap.ru/award?keyword=pneumatic+tmt+rod+bending+machine+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455198/normal_606ce1d78f783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495526/normal_604b28d84d10b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371013/normal_5fcc976bef4f0.pdfIn PDF document text
    • http://bapipakaroxi.22web.org/71045636478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_603bdb4c59749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413223/normal_605803fb2c57b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451231/normal_5fe4c20f6505e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401982/normal_6063f1ae73509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416790/normal_6023b8d06cb68.pdfIn PDF document text
    • http://gagipelujer.iblogger.org/23892413339.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382629/normal_5ff9a4832fa26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459941/normal_5ffe9a8d41a2e.pdfIn PDF document text
    • http://detubogoxugovub.22web.org/patepalewawigobufowof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/sedowedi/toyota_corolla_le_2009_price_in_nigeria.pdfIn PDF document text
    • http://fewabawunidud.epizy.com/dubijox.pdfIn PDF document text
    • http://supabusoto.rf.gd/2002_ford_ranger_workshop_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/zixakowukij.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/reporting_linear_regression_logarithmic_transformation.pdfIn PDF document text
    • http://gozudivigel.epizy.com/ladigawafuzekumatomi.pdfIn PDF document text
    • http://basetawagegula.epizy.com/13234626162.pdfIn PDF document text
    • http://wilafavibu.rf.gd/fudeti.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B6D 5500 bytes
SHA-256: d167eacff11be8b4249ce915a58ef27ad9d651a7ca51f1cd3088d0dcdc8829f9
font_01_sfnt_off00015def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DEF 12092 bytes
SHA-256: a6b8f944fdffc023c5862c2ba9c03e9faf511c67ac7b3ab18cb7ca8b8f72a364
font_02_sfnt_off00018738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18738 5544 bytes
SHA-256: 35ffd8fec3a31c375f5a8555ea851115ba56f43736c0c6de37dc8fa929e4e36e

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