Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3e59d77371256d…

MALICIOUS

PDF

80.8 KB Created: 2021-02-24 09:06:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b07c5a6cc9aabd3d092c32bd841af5c4 SHA-1: 4b0fb22eabfe9866141019f0e2b2cfe64c3a748d SHA-256: 7d3e59d77371256d82962f1fd83181a73fbfed2f5ab3d4b6d5e32c9680964d35
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. ClamAV and ML classifiers flagged this file as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

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://maypoin.ru/strik?utm_term=kenmore+glass+top+stove+burner+repair PDF link annotation
    • http://help-service-support.com/bemevanar2ap4a.pdfIn PDF document text
    • https://jitezawedum.weebly.com/uploads/1/3/4/6/134688152/8496638.pdfIn PDF document text
    • http://fimewot.xyz/vidmate_app_free_for_android_uptodownoww9a.pdfIn PDF document text
    • https://cdn.sqhk.co/pemazekefise/XEGgcgh/luvofejekefoziz.pdfIn PDF document text
    • http://trokot-tonirovka.online/reloading_bench_for_sale_near_me0q0yz.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/oqNghig/emergency_call_button_for_elderly_uk.pdfIn PDF document text
    • http://geesecam.com/teluzebizipenigukes3c81y.pdfIn PDF document text
    • http://fimewot.xyz/why_is_my_total_wireless_phone_not_workingd9xgt.pdfIn PDF document text
    • https://zudomizat.weebly.com/uploads/1/3/5/3/135308615/desojeponizeze.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/e53djgf/sudazojezodefupinano.pdfIn PDF document text
    • http://idealica-official.website/how_to_reset_my_visual_voicemail_greetingqm3c4.pdfIn PDF document text
    • http://italy50wow.pro/omnisphere_2.5_updateww7b8.pdfIn PDF document text
    • http://kind-insta.site/most_valuable_toy_cars8gu47.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
    • http://zobawukesilebaf.epizy.com/crunchyroll_android_app_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/wavineriguz.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/zimuvunavagemujifalip.pdfIn PDF document text
    • http://xirasajizobopa.rf.gd/48926301041.pdfIn PDF document text
    • http://kajilurugo.rf.gd/idioms_and_phrases_for_ielts_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/zegesogajizibepovifa.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_off0000f161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF161 5192 bytes
SHA-256: f523a8f53e6af23b02ee5d8a2970417a5ec55c37520bc648171ccf037c3f8b61
font_01_sfnt_off000102f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F9 10724 bytes
SHA-256: 0773dbe8fd9ab01d53dd3e7d5ee1fd4346c7818facf935c30448f7377f8dabe0
font_02_sfnt_off0001272e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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