Malicious PDF — malware analysis report

Static analysis result for SHA-256 390f480e05ceb923…

MALICIOUS

PDF

70.9 KB Created: 2021-02-15 18:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1ebeb2a8e153ea69017d224579d58cdf SHA-1: 430b7afe104f4ef642244c704d6b6c377883ab48 SHA-256: 390f480e05ceb9239034ae7fc8560e18cd18c1d0bf126dfc42aed9e069e71455
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The embedded URL points to a site offering an Android application, suggesting a lure to trick users into downloading potentially harmful software. The document body, though heavily obfuscated, contains references to 'monster park apk for android' and application versioning, reinforcing the phishing pretext.

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://bologen.ru/wix?keyword=monster+park+apk+for+android PDF link annotation
    • https://meletiwupidime.weebly.com/uploads/1/3/5/3/135313264/rajeja-lisaboz-pipagodepu.pdfIn PDF document text
    • https://kupifibadobibe.weebly.com/uploads/1/3/4/5/134512214/d7c4a81a03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424026/normal_5feaeb512dd5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403817/normal_5fec766d8be1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459776/normal_601f8d0213694.pdfIn PDF document text
    • http://tronreserve.online/barber_shop_midwood_brooklynk6vhe.pdfIn PDF document text
    • http://cashbackk.site/4liker_latest_version_android_mobile_appgpl83.pdfIn PDF document text
    • http://helpverifybadges.com/linear_functional_analysis_bryan_p._rynne9ih1l.pdfIn PDF document text
    • http://connexion-amelii.xyz/gitirabaxakesitujimbdel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nefunupu/37468822437.pdfIn PDF document text
    • http://zigimavabixexib.epizy.com/kolabir.pdfIn PDF document text
    • http://neromozib.epizy.com/subaniriwumizuxapuwejeli.pdfIn PDF document text
    • http://gipafame.epizy.com/caesarean_moon_births.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/87667008815.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_off0000da2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2C 5072 bytes
SHA-256: 2e989612fef6db40337f35f55e4a26919f52f9ba8b56e6d805e405ea5f46e45d
font_01_sfnt_off0000eb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB89 10184 bytes
SHA-256: 1731303b8c993e08bb9afb3b2f4da26fc1f589f629fb7c16647560c4bc2b0ea9

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