Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a5ab934d14d00c…

MALICIOUS

PDF

77.2 KB Created: 2021-03-13 22:53:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c5af1141c4881a404940c47c7edab88e SHA-1: be72459e00fbb0a0b25072048b6d123c4938bfa4 SHA-256: e5a5ab934d14d00cd211e57d7f52a3c17d2d76737f57401043ff206e6a33a0b0
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 0.9991

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://golowaki.ru/123?utm_term=inglis+washer+user+guide PDF link annotation
    • https://wavinibavuma.weebly.com/uploads/1/3/1/3/131398010/lavibirobi.pdfIn PDF document text
    • https://wafitaweligu.weebly.com/uploads/1/3/4/5/134587259/9700019.pdfIn PDF document text
    • https://rejudizik.weebly.com/uploads/1/3/4/7/134701546/ganakevofozini.pdfIn PDF document text
    • https://giwadoveti.weebly.com/uploads/1/3/5/3/135305904/b6f98e8811e1a4.pdfIn PDF document text
    • https://ralirepiputup.weebly.com/uploads/1/3/4/8/134852471/1314579.pdfIn PDF document text
    • https://vedexojofidas.weebly.com/uploads/1/3/4/5/134581268/22c0b1.pdfIn PDF document text
    • https://sidanarud.weebly.com/uploads/1/3/0/9/130969336/jevuluxaze-najotopeme-tabox-gejuf.pdfIn PDF document text
    • http://xulorobunikoxu.22web.org/tp-link_tl-wr841n_openwrt_reset.pdfIn PDF document text
    • https://xovonanukotu.weebly.com/uploads/1/3/4/8/134898985/2830560.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_9c895885565c407e902c61fc5a3ec0dd.pdf?index=trueIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_65b48166e1c94948bedeaedee16b8c35.pdf?index=trueIn PDF document text
    • http://tepusijanakigat.epizy.com/74110154978.pdfIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_0574f3f58307421d81688601c5f06a68.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/871700ab-2cb7-4205-b5d5-e6b36a036467/nesudaxipopet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7520be28-1bd4-4627-973b-b46c12f55bad/vebomigojofidopivir.pdfIn PDF document text
    • http://mozenuserexa.rf.gd/nifev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a003f6b8-fe52-4590-bcac-58cdac9a518d/dlink_dir-890l_default_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5abffa11-2bf7-48bb-9103-73be649fcb52/49510397102.pdfIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_42fea00b2f624c529684122f06e3c12d.pdf?index=trueIn PDF document text
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_560a1f485ba64a5f83c67f0c4d6e37c0.pdf?index=trueIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_dd8e663f6c344e3c8aa588ae58b8f93b.pdf?index=trueIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_864d5efc1d29447893f6f37ab8a67595.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a15db4-4570-4f2f-a077-1a2a09722f1c/lomawefamobaxugo.pdfIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_a5775ab819494c02a7eac7abfd2b82af.pdf?index=trueIn 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_off0000eef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF6 5116 bytes
SHA-256: accd73d18190618de8c0040d40671ea78a960c671fef59fc1b96f8a882e0d100
font_01_sfnt_off00010064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10064 11932 bytes
SHA-256: 3fd48ec40e016680a34a904b88e3b0984e3c782297154c6a893c542b41377391

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