Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc160b4ac6956931…

MALICIOUS

PDF

86.4 KB Created: 2021-03-10 16:57:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 456c3ef35cad0d2844ed8b56ed0e3529 SHA-1: 95f8b1c4de72d6f542f31c6233c2bd6ba43f4fdd SHA-256: cc160b4ac69569317e31f58cc8f3a01b083c48353fc8daba8c2177c646a2096b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://midufefew.ru/123?utm_term=diabetes+insipidus+diagnosis+and+treatment+pdf PDF link annotation
    • https://cdn.sqhk.co/joxutedunik/mWAgj0V/ice_cream_parlor_menu_template.pdfIn PDF document text
    • https://cdn.sqhk.co/latipizi/IYfxFgg/standoff_2_mod_apk_all_skins.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455898/normal_6000c804b8ba8.pdfIn PDF document text
    • http://kittyplay.online/nipunakidofatoa4as4.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/ghahhgc/losumuv.pdfIn PDF document text
    • http://mini-cam-v2.club/what_is_the_formula_for_a_22.5_degree_offsetv6b4i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419836/normal_5ff778a3a638c.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/opBgihg/vova_boutique_euclid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_60210f314955c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489980/normal_603c1532c44cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529780/normal_5fd04d4c7cf45.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/adhhgjC/miwofepanekojojibu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_60081f4944987.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413368/normal_5fdd1a8c74206.pdfIn PDF document text
    • http://classkaod.ru/nuluzoluf18c4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455376/normal_600c9ddcecfa8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_338a1ba8803146c8b9d47e1fa00294d6.pdf?index=trueIn PDF document text
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_81e46de64c174b0c8a0fd7738cf8778b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d844a2-fa61-45fb-adbd-f67de454bf4c/rotexosul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298258ac-8164-4f41-81e5-2ae28ae379c8/are_snapper_lawn_mowers_good.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 8

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_off000115ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AC 5468 bytes
SHA-256: 7e9ef73862508508425b1bfa6af4d6ec156ea77dbdd5ce8fcd85af001ff4e39b
font_01_sfnt_off0001282d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282D 10664 bytes
SHA-256: 0024f1e877eb8f3405475ce86f663174ff2a098921f42622064894a132ff8a38

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