Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd93898039e48ee…

MALICIOUS

PDF

70.4 KB Created: 2021-02-25 17:43:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2442e513530e5ee384dc989fb539f38c SHA-1: d473cffcf2eb11fd0c41c5840c48307a6543804d SHA-256: bdd93898039e48ee616b9183ac30e5dd6b38a8c89dd89e35146ee6d427d10a16
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the classification as a link farm strongly support a malicious purpose, likely to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/strik?utm_term=the+little+red+hen+youtube+song PDF link annotation
    • https://rogejizerabori.weebly.com/uploads/1/3/4/7/134763318/9401784.pdfIn PDF document text
    • http://xibipumazanepir.iblogger.org/46948470165.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/echar74/royal_offense_2.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/how_to_open_symbol_barcode_scanner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_600cfc1c1be70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_6000c24732de3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464869/normal_5fd33c1af26bc.pdfIn PDF document text
    • https://dezazobe.weebly.com/uploads/1/3/4/7/134755526/1226632.pdfIn PDF document text
    • https://cdn.sqhk.co/febenapox/aiggjgf/guess_the_word_game_online.pdfIn PDF document text
    • https://legovizadedugid.weebly.com/uploads/1/3/1/8/131856283/raloxupape.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rabuxudaxubaso.epizy.com/7251068531.pdfIn PDF document text
    • http://kowifojabar.rf.gd/kesofigiwapipeburebew.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/fomegotibabuku.pdfIn PDF document text
    • http://donarup.rf.gd/broker_agreement_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/embroidery_alphabet_template.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/how_to_remove_rosetta_stone_from_mac.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD590 5068 bytes
SHA-256: b84ef25b9326294ac3c0b97cf0aab29790a86f63dac18139bc2a051b33c7b880
font_01_sfnt_off0000e6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CF 10988 bytes
SHA-256: f06bb1c09b2a727ac42929a68e90246e63d678b1763125823293653ce4425048

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