Malicious PDF — malware analysis report

Static analysis result for SHA-256 1730d30fd9a27bb3…

MALICIOUS

PDF

74.2 KB Created: 2021-03-02 22:16:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 514ebf89b6089dffede1f605cbbca4c6 SHA-1: 7e911288ab4b06a4ef2df192ef7e3adc92de26b0 SHA-256: 1730d30fd9a27bb3270627a76721391d1751fda26c13c111bfad1b6caeb3265c
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to disposable hosting domains, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of link farms on disposable hosting, suggesting an effort to obscure the final malicious destination.

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/aws?utm_term=junie+b+jones+shipwrecked+read+aloud PDF link annotation
    • http://mujogatebili.22web.org/kazumepimakidazivore.pdfIn PDF document text
    • https://ponozivodu.weebly.com/uploads/1/3/0/7/130775347/towuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/icghgfA/fall_guys_ultimate_knockout_free_download_pc_crack.pdfIn PDF document text
    • http://jojonavakuxuf.iblogger.org/qu_significa_soar_que_se_te_caen_todos_los_dientes_de_la_boca.pdfIn PDF document text
    • https://cdn.sqhk.co/lidabofob/0iaFjiz/wafopijapopivobajakoxog.pdfIn PDF document text
    • https://lenexemumuvag.weebly.com/uploads/1/3/1/4/131438583/801626.pdfIn PDF document text
    • http://tidemelewofu.iblogger.org/jidokepu.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/mudonoka.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/7vhehdJ/sunojawagimidugesijo.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://nupedapubamamu.epizy.com/arranging_words_alphabetically_worksheets_for_grade_3.pdfIn PDF document text
    • http://xepalufozakot.epizy.com/31449355048.pdfIn PDF document text
    • http://vegawududabuz.rf.gd/1978_prowler_trailer_manual.pdfIn PDF document text
    • http://malinaliwul.epizy.com/nujipifukapujikex.pdfIn PDF document text
    • http://zaxigadanu.rf.gd/betterme_calm_sleep_meditation_mod_apk.pdfIn PDF document text
    • http://sirerig.epizy.com/serial_dilution_lab_answers.pdfIn PDF document text
    • http://zaxesagujudiwa.epizy.com/befejasasatawewawo.pdfIn PDF document text
    • http://ximipine.epizy.com/e7_abyss_85_guide.pdfIn PDF document text
    • http://xofududegotu.epizy.com/71462746806.pdfIn PDF document text
    • http://pikusotanuw.rf.gd/18641789951.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_off0000d414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD414 5324 bytes
SHA-256: fbd819a356463613dcfb7ea07d6296aaaa4664c0d2671bda28e7db9218e933ad
font_01_sfnt_off0000e61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61B 11104 bytes
SHA-256: f37446feb233c6e9c6dc92112243492d9c34cf8179452cf5829bbfa761b2f8c2
font_02_sfnt_off00010b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B71 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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