Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e838b7e5faed72…

MALICIOUS

PDF

81.6 KB Created: 2021-03-16 19:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 460bdd0ab1af4234558dae673f233950 SHA-1: 9095d86887f7ec6007d344281af029d6daa0f988 SHA-256: 62e838b7e5faed7209afd2fac9a0d4c2ef2802d2c55c5d6c5f27e99fad9eb9f7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document exhibits characteristics of a callback phishing scam, as indicated by the 'PDF_SUSPICIOUS_LINK_LURE' and 'SE_CALLBACK_LURE' heuristics. It contains multiple external URIs, including suspicious domains like 'dugedepap.ru' and 'ig-supportcenter.xyz', suggesting an attempt to redirect the user to malicious content or services. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dugedepap.ru/wix?keyword=craftsman+41a4315-7a+parts PDF link annotation
    • https://cdn.sqhk.co/monubinejon/gehdtRL/arteriografia_femoral.pdfIn PDF document text
    • http://itdiscount.pro/wasikugokerirityh6a.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwebuvowo/i4hjjjd/best_baby_skin_products_for_newborns.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_601b66776e748.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/BUhbdjc/meropebeputaxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476569/normal_5fce94586db29.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/ffifQhh/80072817107.pdfIn PDF document text
    • http://mastericy-chistoty.ru/inter_first_year_books57xph.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwovado/jhZzuXI/meditation_apps_for_android.pdfIn PDF document text
    • http://ig-supportcenter.xyz/satixudaxozunazumodaejcqg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://monovopo.rf.gd/13349301835.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/29091485728.pdfIn PDF document text
    • http://fanudisa.rf.gd/plant_physiology_and_biochemistry_journal_abbreviation.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/wileyplus_answers_calculus_1.pdfIn PDF document text
    • http://navibizo.rf.gd/zebuxixiginedosesufuwadil.pdfIn PDF document text
    • http://benuvaf.rf.gd/how_long_does_wahl_clippers_take_to_charge.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/beowulf_translation_bro.pdfIn PDF document text
    • http://xevibija.rf.gd/percy_jackson_and_the_olympians_the_lightning_thief_chapter_1_summary.pdfIn PDF document text
    • http://fakopasetiboni.rf.gd/48485914773.pdfIn PDF document text
    • http://fuzamerivamowo.epizy.com/secretos_de_la_mente_millonaria_declaraciones.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_off00010270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10270 5460 bytes
SHA-256: 4dd483c129f561ef698da26a93408da85f46d5426e00010ec549d7bf2813bc83
font_01_sfnt_off00011504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11504 10740 bytes
SHA-256: 59c3e78fdd1bc9a077a331889760da1db0488d5c3a78ace54229b430b8d9bfb7

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