Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe15d3bc1d9ea8a9…

MALICIOUS

PDF

72.8 KB Created: 2021-04-03 15:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8c4937b674d22d86d09c2c83619f01f1 SHA-1: 14ce5c8ef92a9147920e0ea8aa3144bec605bc48 SHA-256: fe15d3bc1d9ea8a97848feccb537568d7be6c9159ff4b47fd10f94aec45b2f0a
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous external links, many pointing to disposable hosting services, indicative of a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, potentially for credential harvesting or malware distribution.

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://lozipotod.ru/wix?keyword=mario+camarena+twitter PDF link annotation
    • https://cdn.sqhk.co/noluxokeruma/QIAgfRg/expeditions_tuscaloosa_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/jgij1Fk/22035066721.pdfIn PDF document text
    • http://lutukolotizolo.22web.org/kptcl_junior_assistant_previous_question_papers.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/iFRrgdc/bbc_football_transfer_news_liverpool_fc.pdfIn PDF document text
    • https://cdn.sqhk.co/tosaporafoxa/l9y62uq/lol_kalista_guide_deutsch.pdfIn PDF document text
    • https://cdn.sqhk.co/nakusunegud/haicvig/morton_salt_meat_curing_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/vavusiwi/PiiicwO/loboluzavugetuxowemiwamu.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/rjjpBjh/free_download_csr_classics_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tefaxobaf/UQzghV7/best_mobile_bitcoin_wallet_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/wimigobefe.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/dokigi.pdfIn PDF document text
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_e90c2bfc82d14d34b3301fe1c2610d39.pdf?index=trueIn PDF document text
    • http://nifopufu.epizy.com/vefalixudesag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aaa2709-632e-45fe-8c77-43ca4e98eec1/miwexaf.pdfIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_8c2e384f6ccd404ca7df13364b364d02.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/salade/what_is_a_quarantini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ea65808-179d-41a3-92a0-4f5c656c40b5/67686283305.pdfIn PDF document text
    • http://ruwabegaxiz.epizy.com/29717085923.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_off0000e017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE017 4832 bytes
SHA-256: 992c8397b373fbaaf7e7da560d63dbecf26bc28b7f49c6814d4f60555faaf7e9
font_01_sfnt_off0000f088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF088 11132 bytes
SHA-256: 7c02b2a2c811b7e2d702317fae20397c6e09136d079c8de28f8fa44cb06dfaae

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