Malicious PDF — malware analysis report

Static analysis result for SHA-256 1364abbba1e70da1…

MALICIOUS

PDF

76.3 KB Created: 2021-03-14 07:46:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 30a440a41323bc1222885404d44e13f1 SHA-1: 59a441965821dc4d25a9948b424811a7b492009b SHA-256: 1364abbba1e70da1897c7be3063f198a76c9fbcd606cec084598d35cfb86ea68
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm, indicating a phishing or malware distribution attempt. ClamAV and ML classifiers strongly indicate maliciousness, specifically identifying it as a phishing trojan. The document body, though heavily obfuscated, contains keywords like 'fba music list' and application metadata, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=fba+music+list PDF link annotation
    • http://befotuke.mywebcommunity.org/lexiwukaruvagar.pdfIn PDF document text
    • http://lofoporubatul.mygamesonline.org/honeywell_rth230b_manual.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/annette_larkins_recipes.pdfIn PDF document text
    • http://fuvidevifa.scienceontheweb.net/blheli_30a_esc_programming.pdfIn PDF document text
    • http://bepelisufozasep.mywebcommunity.org/amoxicilina_clavulanato_suspenso_bula.pdfIn PDF document text
    • http://nuxuzuruguli.mypressonline.com/how_to_open_top_of_whirlpool_cabrio_platinum_dryer.pdfIn PDF document text
    • http://musomojil.mywebcommunity.org/aprendizajes_clave_para_la_educacin_integral_cuarto_grado.pdfIn PDF document text
    • http://novubelugalij.medianewsonline.com/9104700942.pdfIn PDF document text
    • https://bazodezivif.weebly.com/uploads/1/3/6/0/136088162/jelenonef-poxupo-varufukalakaz-daridepamub.pdfIn PDF document text
    • http://nuxuzuruguli.mypressonline.com/dotul.pdfIn PDF document text
    • https://jinunezig.weebly.com/uploads/1/3/4/3/134308797/9221500.pdfIn PDF document text
    • https://bezofaxifi.weebly.com/uploads/1/3/1/6/131606652/kevirono.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/xuriwimodafez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gajopem.epizy.com/unabridged_birth_certificate_south_africa.pdfIn PDF document text
    • http://dovanokeji.epizy.com/decrease_size_acrobat_pro.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/is_covid_causing_high_blood_pressure.pdfIn PDF document text
    • http://lunowakaneruf.rf.gd/26626729786.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_off0000ec83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 4944 bytes
SHA-256: eee032e34094b935041e61a76d60942e77ea7df186de0623c9b34bfd15ce0285
font_01_sfnt_off0000fd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD48 11652 bytes
SHA-256: c6cd10d018605167079940d84b703d50ae43be71c1a6177e09efdd0d0b68b594

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