Malicious PDF — malware analysis report

Static analysis result for SHA-256 82addc0d2e7d16cd…

MALICIOUS

PDF

90.4 KB Created: 2021-03-07 02:58:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 430d0d725c823160781002c53e6bfce2 SHA-1: 7259c7c48f8fcf68141a99bfe1734d8a3c9a0adb SHA-256: 82addc0d2e7d16cdca0ab8d6c362bbf683ec2be2faddce055b367f22924e4942
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The primary attack pattern involves directing users to external resources, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/123?utm_term=maya+angelou+poem+woman%2527s+heart PDF link annotation
    • https://wamibujobaju.weebly.com/uploads/1/3/4/7/134716207/be4b800ca.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/ritogijeloveratonipazobuf.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/pupido.pdfIn PDF document text
    • http://xemakaze.mywebcommunity.org/11867449359.pdfIn PDF document text
    • http://detonic-official.website/smart_board_projector_setupr8x4h.pdfIn PDF document text
    • https://vafadujujuzigub.weebly.com/uploads/1/3/5/3/135312713/c66290ba758.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383573/normal_60008788e5bde.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/what_is_the_meaning_of_the_weary_blues.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453888/normal_603859bac2022.pdfIn PDF document text
    • https://wewokidopubix.weebly.com/uploads/1/3/0/8/130873978/kejata.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_603570df1995a.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/printable_keto_diet_food_listl60ek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/68035923-cac3-42e2-b2b7-93bce6861bd8/mupafobupomaxo.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/12869953902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c918aec2-f73c-45a2-914f-343fc55bd74d/can_you_play_tom_clancys_the_division_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d698ec1b-1e6b-4ad5-9096-293b69a33428/black_and_decker_20v_max_string_trimmer_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2912130-6b5e-4862-ae72-d98196ff0933/what_does_captivity_mean_antonym.pdfIn PDF document text
    • http://xemunebo.atwebpages.com/89199909170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd5b7067-79d8-4a7e-b42d-ec370e7284eb/tubixevivikakeluxeto.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_off00012572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12572 5464 bytes
SHA-256: 72ebeea2a968aeb840776c5f0decd0fa29d1583557306a6a4d37f290acfe4b12
font_01_sfnt_off00013811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13811 10684 bytes
SHA-256: 1e13c5ce299c969ecb8248d638b7f22a14d28bab17ea7e5032517f9fe4821d19

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