Malicious PDF — malware analysis report

Static analysis result for SHA-256 7058ae45958ef3c1…

MALICIOUS

PDF

69.5 KB Created: 2021-02-23 08:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 6f742fcb02062a9ac0280d3eaf96b8ce SHA-1: f1ca82124700f13a3d356d0fe499fbdcd743e86d SHA-256: 7058ae45958ef3c1941964c65b786bc52bab34753ee023e68207982c8cbebb17
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://jottigo.ru/wix?keyword=hantek+dso5102p+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372740/normal_60075ffd623f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389582/normal_60279e41a023b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449599/normal_60195253d5695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418583/normal_60163d78c2786.pdfIn PDF document text
    • http://tajafife.iblogger.org/how_to_understand_stock_portfolio.pdfIn PDF document text
    • http://mobevusujezuno.22web.org/gedalibami.pdfIn PDF document text
    • https://cdn.sqhk.co/riroxale/i2biegg/double_dragon_trilogy_pc_download.pdfIn PDF document text
    • http://jujiwaneko.iblogger.org/belajar_coding_android_untuk_pemula.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412592/normal_5fe3c85a2ac52.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/ijbjheQ/printable_halloween_word_search_puzzles_for_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/NDcjgiw/lavibofewida.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415068/normal_5fe3297a75cee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wetedezowob.rf.gd/norton_antivirus_free_2018.pdfIn PDF document text
    • http://zejeganemumejow.rf.gd/71870685194.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_off0000d31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31D 5548 bytes
SHA-256: 861eed8b84f2516502ef987458fa8eb9c95e89abe6739e59a222779977b87769
font_01_sfnt_off0000e62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62A 10368 bytes
SHA-256: 7b927ebd43a52338d99685b085aa29299bc442a7d1cd80e7707cab745e987bb4

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