Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26e3e1fbf45a4f9…

MALICIOUS

PDF

80.2 KB Created: 2021-04-20 14:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 66b35ca112748d3c9c4a444f12227601 SHA-1: b0d5f18454e7a095036b1ab5d02dc94a7c94dba1 SHA-256: e26e3e1fbf45a4f98c7914308425b462754b3f620991ae37a0263e886670c472
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 0.9997

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://druttle.ru/strik?utm_term=como+hacer+un+pdf+con+imagenes+en+mac PDF link annotation
    • https://filikegepux.weebly.com/uploads/1/3/5/3/135346592/pokugisi.pdfIn PDF document text
    • http://afracheat9.xyz/how_to_make_a_starbucks_frappuccino_mochaayc6g.pdfIn PDF document text
    • http://dmgameplan.com/8931464661a78xr.pdfIn PDF document text
    • http://7gusevshop.website/60461706938jhvzz.pdfIn PDF document text
    • http://pitukegurajokup.22web.org/what_is_critical_thinking_in_primary_school.pdfIn PDF document text
    • https://voximaka.weebly.com/uploads/1/3/4/0/134017552/mujusaliwus_guwawatijujege.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/ca3f962b-bdde-4274-9a4d-16f1a0eaeaa2/23345967413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8df201a-cf64-40f5-87af-a5fc7aac1f36/92192713147.pdfIn PDF document text
    • https://2ea3657d-1c4c-40dd-8491-58aeeb8dc933.filesusr.com/ugd/18a85a_f7c01ebcf86142b79b22e219f1585011.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/183be06e-4622-469e-8932-d57ecd482bf1/what_does_e1_mean_on_a_brother_sewing_machine.pdfIn PDF document text
    • http://walefofu.rf.gd/err_cleartext_not_permitted_ionic_4_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd564593-6721-4c59-a8d3-8ef935755c5c/faxelovojawabefovin.pdfIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_d1b918eb3e2147b7b13b919d035821f5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c86aae3f-ccfd-42ed-a248-731e80d60792/brass_ships_engine_room_telegraph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5af205c-3f00-4f0e-8a26-8cf1dc507fca/9180223872.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_off0000f75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75C 5440 bytes
SHA-256: 120d6d8cc60e563b04596aabef560c3e19bac531b982f339a1281bc94edbab04
font_01_sfnt_off000109b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B4 12448 bytes
SHA-256: 7e43db50e5ec87c8149d7f4d7cd40c6c5c76dab2a87caa87ac5b0a514992473d

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