Malicious PDF — malware analysis report

Static analysis result for SHA-256 365f9c6249d7afec…

MALICIOUS

PDF

89.3 KB Created: 2021-03-04 13:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e7a5b24680c9fdf5a2a25fef4baeca36 SHA-1: 5ea10c76922fd4062047db521a895590389e0160 SHA-256: 365f9c6249d7afec717b599324393781e3da8262bd179052f6bdbc4d44d3d13c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://midufefew.ru/wix?keyword=technical+communication+today+4th+edition+pdf PDF link annotation
    • http://xevusezes.medianewsonline.com/32098113441.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/life_fitness_x5_elliptical_used.pdfIn PDF document text
    • https://cdn.sqhk.co/nisikevepoxi/bAigOfw/tutorial_discord_among_us.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/igenh7Q/plus_messenger_app_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rabuzopat/jjIKUkf/17230243743.pdfIn PDF document text
    • https://cdn.sqhk.co/wukatigubo/2jgl5DR/laws_of_the_game_soccer_quiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454040/normal_603e87699e1a0.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/3623703117.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/gfhhOe6/discovery_toys_marble_run_instructions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471481/normal_5fc5bdc16a345.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/dhiyBih/42123613322.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417208/normal_5ffbd257929d6.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/d64ec2a4-7387-4c74-af28-08e8747fbc7b/zozonaxijujopapibaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d541f0-fbba-4fa4-ba65-751d99211780/roxaxiguxagisamaroj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56cc5962-f3a8-496c-b5eb-ea496b888df3/kozomoletefilufosij.pdfIn PDF document text
    • http://tuxefunuzire.atwebpages.com/23881783394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c40561d-428c-41a7-ac61-9a3d2dd301c2/navy_e4_eval_due_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/520778ae-75f4-49b1-adcc-2817bad5ba6e/pawase.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A3 5260 bytes
SHA-256: f4ca8e4cd2fbf23568aca37bd89765fec427c9db9d60326b4138036bbc02cbc2
font_01_sfnt_off00013276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13276 10884 bytes
SHA-256: 6575db27e9fa943d3f93ea0ac3f9e81049bf0ef9c9cc2bdd80a05c05d67fbf6d

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