Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1703c2dd9f2eed8…

MALICIOUS

PDF

73.6 KB Created: 2021-06-07 11:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 391f50f774e25a0a207f7fed1ad0e0c7 SHA-1: d534803524500675dc4b21a392b094dce943f9ff SHA-256: e1703c2dd9f2eed831576de734dc0e2cdb4d1b67b0e24db289f2d8999e71879f
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The document contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The primary lure appears to be information about connecting a 'neato d7 to alexa', which is likely a pretext to drive traffic to malicious sites.

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://huntic.ru/pbw?utm_term=how+to+connect+neato+d7+to+alexa PDF link annotation
    • https://wetexojozow.weebly.com/uploads/1/3/0/7/130740218/04e87ff62bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460980/normal_60505531c949c.pdfIn PDF document text
    • https://bewimowijukoja.weebly.com/uploads/1/3/4/5/134584545/761053.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375353/normal_5ffdea5d9a546.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4392451/normal_60b0000fd0fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451225/normal_604fffcac989a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410207/normal_5feb29696cd09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470537/normal_6062edfc91af7.pdfIn PDF document text
    • https://vonosupaxeme.weebly.com/uploads/1/3/0/7/130740497/soxadalerajudapawox.pdfIn PDF document text
    • https://geguromivakof.weebly.com/uploads/1/3/4/3/134332909/5229880.pdfIn PDF document text
    • https://nigejozezasila.weebly.com/uploads/1/3/4/7/134768622/negigeji-jetujol-telazuz-pusilorul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503279/normal_6033840d57e04.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/48408003-4d94-4d6b-9acf-28fd91e21189/marionettes_inc_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b346338b-0552-46ea-9166-6666b6e08e81/how_do_you_reset_a_whirlpool_fridge.pdfIn PDF document text
    • http://ronakiko.pbworks.com/w/file/fetch/144540252/52532025367.pdfIn PDF document text
    • http://jujupaw.pbworks.com/w/file/fetch/144617103/42606737742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a571fb4c-92cb-47db-af6d-25e6f5c7b0e2/english_is_a_crazy_language_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4110777-9647-489f-aed6-2426c7de44f6/can_you_return_amazon_items_during_covid.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_off0000e2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D6 4860 bytes
SHA-256: f5760a73c9543c808afd7e93201cbd2c6e828f767ee3ea9c1f5370347c00adbc
font_01_sfnt_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 10564 bytes
SHA-256: 0ebb2fe996e62862c3d3e42dd116a3b994dd3fb4677ee45675e48da3e8974e20

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