Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d2e1da9ea756d3…

MALICIOUS

PDF

82.5 KB Created: 2021-03-21 11:15:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cd6e970d877226f7de70bc652162e687 SHA-1: b9cc9b8cc3083db2f47ce8c473fdcf0eee257ff5 SHA-256: 89d2e1da9ea756d3ebaf91ed9d1dd079fc5f6977ddb951fbedd262ad9f1db954
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/123?utm_term=downton+abbey+season+6+episodes+guide PDF link annotation
    • http://italywow.space/fishing_report_keaton_beach_florida6zuk1.pdfIn PDF document text
    • http://mobile-media.moscow/assistive_touch_mod_apkvff9b.pdfIn PDF document text
    • https://rusijarumeza.weebly.com/uploads/1/3/1/8/131871651/8734811.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/hjp6Ubz/virtual_reality_grandma_vr_horror_fleeing_the_complex.pdfIn PDF document text
    • http://badge-verification-center.com/zuronuvgr7yz.pdfIn PDF document text
    • https://walonani.weebly.com/uploads/1/3/4/3/134372970/3768349.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/gjiePjd/spiralizer_zucchini_salad_recipes.pdfIn PDF document text
    • https://bujasosepamus.weebly.com/uploads/1/3/4/6/134626994/vifefefexaza.pdfIn PDF document text
    • http://itgermany.net/cnil_guide_rgdpcjly7.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/jaFWIuO/fisise.pdfIn PDF document text
    • http://13millions-warzone.store/pezewelawasez4ylrx.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/50b358a1-218c-4331-b658-0c5406240a0b/flow_diagram_design_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/62532381765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c8bfcb-728e-41f3-8b49-0971b7a97e3f/best_astrology_books_in_hindi_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/79634049589.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/mibudenipiwidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ab3fa1b-7f6c-4474-8840-71985c8d3911/how_to_write_love_poems_for_her.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/zovel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372942b0-316d-4722-a140-5fb33b1a1c77/mamiya_c330_for_sale_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c135c028-4b9d-4c34-b6e7-33ff19acc147/62030201099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23607687-dab0-4b57-a796-5d4d25f80617/lobozexesogelifaxiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ed1e0e-7d9e-4d84-87c5-692ba0ce8792/10001127751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7ccc80-ebce-4453-bea5-cb05b45777a5/44915859468.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/mr_vineet_kumar_name_ringtone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f5ad32b-e075-4869-904f-0eabca2e98ce/51696148216.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_off000102a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A8 5484 bytes
SHA-256: 11a708d7ea73f200174810335ecae008a7d2e2b54a2036dcc059f1dee66b0cd4
font_01_sfnt_off00011581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11581 11464 bytes
SHA-256: ebb45c9dac85f37969d3a1b83093361b9fa4a4fb408aa1e712be923694a051b0

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