Malicious PDF — malware analysis report

Static analysis result for SHA-256 136ef2d40928aaad…

MALICIOUS

PDF

72.9 KB Created: 2021-02-14 01:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c4290ef6ed558fada77b615b89b5054e SHA-1: 84281f7998de734bbfcda1062c335472b8ec9405 SHA-256: 136ef2d40928aaad20f59573bf92c426b7e091543bf9b71c18f7aaa8d04e4b8e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and is described as a link farm. The document body, though truncated and containing metadata, suggests a lure related to song lyrics, which is likely a pretext to direct users to malicious sites.

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://baarspo.ru/123?utm_term=like+you+promised+lyrics+christine+d%2527clario PDF link annotation
    • http://whalesqpa.fun/duposezisolomofotisarlzv41.pdfIn PDF document text
    • http://nivawegokex.22web.org/winapogasudazavelixete.pdfIn PDF document text
    • https://lijokojojet.weebly.com/uploads/1/3/5/3/135333606/raluvod_valitukar.pdfIn PDF document text
    • http://aycotoro7.xyz/wings_of_fire_in_bengali_free_downloadf38s4.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxegaxujifo/U4Wvxic/kemozudexekim.pdfIn PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/bejenopefoxeb.pdfIn PDF document text
    • http://pek-24.cc/nifty_technical_analysis_software_freeumgsr.pdfIn PDF document text
    • https://zemabata.weebly.com/uploads/1/3/4/6/134677216/mepopuvonufugibe.pdfIn PDF document text
    • http://hotloveme.online/85141194301ypcgs.pdfIn PDF document text
    • https://cdn.sqhk.co/wovupeni/jhiqjij/dadezidosijalazukifo.pdfIn PDF document text
    • http://pamesiso.22web.org/budujunojivogoliwanox.pdfIn PDF document text
    • http://qiwi-wallet.online/60880945546hactx.pdfIn PDF document text
    • http://zinuxuf.22web.org/samadorigagukupol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lebodevafetag.epizy.com/friday_the_13th_part_7_parents_guide.pdfIn PDF document text
    • http://pasexojubil.epizy.com/bioterio_definicion.pdfIn PDF document text
    • http://lomipew.rf.gd/28149114292.pdfIn PDF document text
    • http://luxusuriva.epizy.com/23603293293.pdfIn PDF document text
    • http://dowulutidapewu.epizy.com/upsr_2019_answer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CA 5336 bytes
SHA-256: 68713380ae590f16512e9c11c1097bf449b63757516828dfb569b3c98f05f9ca
font_01_sfnt_off0000e4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CB 10640 bytes
SHA-256: dfabc64844477c90e201243e80df9fc705bc6538d1cfed5790ea6b18a43a240b
font_02_sfnt_off00010790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10790 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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