Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2118d36fb69a64…

MALICIOUS

PDF

101.7 KB Created: 2021-02-28 14:06:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 85a370be1ddde13f028f2c5d2e57a16f SHA-1: 544a581e5de16802e82090325db3c943bd1f3959 SHA-256: 3d2118d36fb69a64578fa2dba9fa6dd9e550ac246ed31ffbb5231d51587f5043
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, a common tactic for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

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://botokaw.ru/wix?keyword=millard+atc+infinite+campus PDF link annotation
    • http://pestore.pro/dhl_international_air_waybill_formjhi78.pdfIn PDF document text
    • http://naturaitalia.space/68584760592nvj2b.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/powed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389606/normal_5fdb5b59b6b70.pdfIn PDF document text
    • https://tumovapexawezan.weebly.com/uploads/1/3/1/3/131398362/pagobuvuvetut-kokuf.pdfIn PDF document text
    • https://dixatuwep.weebly.com/uploads/1/3/5/3/135398053/7017584.pdfIn PDF document text
    • http://salonhq.xyz/mcq_anesthesia_free_downloadffba0.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxinugokas/hibgejb/2nd_hand_clothes_near_me.pdfIn PDF document text
    • https://vewudati.weebly.com/uploads/1/3/0/8/130873955/4d902c52559e08.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxoporerom/xhgtich/picture_ideas_for_1_month_old_baby.pdfIn PDF document text
    • https://cdn.sqhk.co/vewimidipiv/3xgjX8D/world_conqueror_2_midway_island_tips.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/injeibl/724_stg_eod.pdfIn PDF document text
    • https://pulakaxumif.weebly.com/uploads/1/3/0/7/130776647/8141884.pdfIn PDF document text
    • https://bovopoboj.weebly.com/uploads/1/3/0/7/130776351/tokuze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468286/normal_5fee7c448956a.pdfIn PDF document text
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/lesurev_sukimojapej_zununumifagado.pdfIn PDF document text
    • https://letazofuwukuge.weebly.com/uploads/1/3/4/8/134869061/5245809.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/zezobar_wakib_zozafolukizumok_riwet.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/jasipefulaxiduj/wobologupapesavi.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_off00015322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15322 5304 bytes
SHA-256: 75d2201b51e58e525bf3ba2a3c559ec1e16943c0b1f2499ed9f886b99cb19290
font_01_sfnt_off00016523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16523 10704 bytes
SHA-256: 6a3d3c5ebb53d09dd000cbc47be9ba641b3bff3341314b96fbff7aa6f27d0987

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