Malicious PDF — malware analysis report

Static analysis result for SHA-256 af044423410c8c96…

MALICIOUS

PDF

80.5 KB Created: 2021-03-25 09:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 492f64d5ec76d027af5660d2a5f195d4 SHA-1: f541c83dfa6b016d12d6e3d2b89900e40b91ecf4 SHA-256: af044423410c8c9627146ea5fad0fcfa6434d63de6a9e50a32a67e379ff93574
166 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially unreadable, contains references to 'unzip rar free mac' and a URL pointing to a download page, suggesting a lure for a password-protected archive. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' directly supports this, indicating the document's purpose is to trick users into handling encrypted payloads. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or malware distribution scheme.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://golowaki.ru/123?utm_term=unzip+rar+free++mac PDF link annotation
    • https://sutulozutujak.weebly.com/uploads/1/3/4/8/134884412/rekunasowe_lifomuxaravesu_noderixabiroja_toxubobogib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_5fd06675ea0c2.pdfIn PDF document text
    • https://buzapakamewogu.weebly.com/uploads/1/3/4/3/134366326/tawaguwawekixojomo.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/XiatRRx/stickman_warriors_2_epic.pdfIn PDF document text
    • https://gixebodaloru.weebly.com/uploads/1/3/1/3/131379223/folosezi-rirad.pdfIn PDF document text
    • https://lewumirobubav.weebly.com/uploads/1/3/4/7/134762292/sitin-xusexasula.pdfIn PDF document text
    • https://lisomoduxu.weebly.com/uploads/1/3/1/3/131383329/90a23fd3d68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_5ff7f4cb67827.pdfIn PDF document text
    • https://bufasijo.weebly.com/uploads/1/3/2/7/132740378/afc03a.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/hj9hjIR/59004880415.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/giVgdhd/moregalina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5fd83436704e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_6035325eac270.pdfIn PDF document text
    • https://cdn.sqhk.co/tiluzegata/caujcjh/segozawotadokorovogake.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/judeze-susapelemowifo.pdfIn PDF document text
    • https://cdn.sqhk.co/venifirub/Ehdgdjc/13045937411.pdfIn PDF document text
    • https://cdn.sqhk.co/koroxofusino/fBjdohf/taxetulovuzav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuzuvulas.epizy.com/wuvopedilegapafezo.pdfIn PDF document text
    • http://kajufikuxididon.rf.gd/elasticity_and_inelasticity_of_demand_and_supply.pdfIn PDF document text
    • http://bazitobabin.epizy.com/what_is_heart_line_on_palm.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_off0000fe56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE56 4992 bytes
SHA-256: 708e226f9fd9a35592a7f5ea022fd597358e2056aa3f1ac23ab4442973b7f3f0
font_01_sfnt_off00010f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4E 11048 bytes
SHA-256: 433006697c41513c2a62619e737a86e0e467d3d1b3f0595bfd0021d5616be4fd

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