Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b8d46af301d0dc…

MALICIOUS

PDF

84.6 KB Created: 2021-03-21 02:33:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c0aef795d8da7a70bf67c30927cc16df SHA-1: 657769c01fe96d3fa3fd55746d1f0ad7a1e42500 SHA-256: a5b8d46af301d0dc872259d78ca6dd88255379ec13823aaddd0260f0d536807e
244 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and a machine learning classifier, indicating it likely serves as a phishing or malware distribution lure. It contains a large number of embedded links, many pointing to disposable hosting or redirector infrastructure, such as the critical finding of a link to 'crophysi.ru'. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it is designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=hard+answers+quest+in+skyrim In PDF document text
    • http://trenolgia.buzz/33854713705xja71.pdfIn PDF document text
    • http://mgacessoria.online/writing_a_news_report_sampleijd0q.pdfIn PDF document text
    • https://cdn.sqhk.co/kifateten/HWjeSjj/31889119252.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/iighd8M/96252404566.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/jfjehd6/pimomiwowab.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/msica_techno_mix_de_los_80_y_90.pdfIn PDF document text
    • http://degimogug.mypressonline.com/bronchiolitis_article.pdfIn PDF document text
    • http://tideparipawovu.mygamesonline.org/what_is_the_keto_reset_diet_plan_to_follow.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/EgcewYl/2nd_grade_spelling_worksheets.pdfIn PDF document text
    • http://majovevalaji.sportsontheweb.net/vifako.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/ZxjcecM/48382701711.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c6185c66-dd85-48cb-9877-7f82d49324b3/55127290857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0fb4120-4915-4c00-9672-132fbcc5d3d9/possible_jobs_for_information_technology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5ac37b3-9e6a-4d77-a280-6a09328e5efb/88267221697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d63c17de-5bbc-4d53-b993-1ccebb5ac39f/galazokatazegozi.pdfIn PDF document text
    • https://f3c4034a-4a94-4c47-b6c5-0445626d7bf8.filesusr.com/ugd/655f09_a05b0bf92c554532820f64c155b8d017.pdf?index=trueIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_61368e32536d4935bfc3dd09eced9ebf.pdf?index=trueIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_6807e5e4a6f4455abd89c1602e5ada1a.pdf?index=trueIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/86328161950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3945166f-ccd1-4e81-85ac-e3bf1e8caa61/rovers_morning_glory_thursday_hook_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb911b0-6763-40f0-afaa-0ad79b75ae17/how_to_clean_lint_filter_in_fisher_paykel_washing_machine.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF51 5056 bytes
SHA-256: 9cf15bc10770dcb7ca1844d716b7393d9680f7e959d94637e6a1921b2c3dbab2
font_01_sfnt_off0001106f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106F 11640 bytes
SHA-256: 6275cab019fe1a2aa1358660bfb407c35db5bb092dcec17be51dcfbecc5e7120
font_02_sfnt_off000136db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136DB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.