Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d43c6feb3fd845…

MALICIOUS

PDF

82.5 KB Created: 2021-03-20 03:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 80db0853b79e401cf21610bd842593db SHA-1: 853d620d4ae06f05aaec819f4dfa34eebe754b20 SHA-256: f3d43c6feb3fd845b388c4981a4353f42af18dd5b27204c4189e4a719d3a14db
186 Risk Score

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 0.9996

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
  • 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://ponafet.ru/wix?keyword=showbox+5.35+apk+mod PDF link annotation
    • https://kejidelevotina.weebly.com/uploads/1/3/5/3/135326148/5561513.pdfIn PDF document text
    • https://sufivelogazawe.weebly.com/uploads/1/3/4/6/134600369/3802174.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/fVTuhcs/sawagemijojiwikekeme.pdfIn PDF document text
    • https://cdn.sqhk.co/rirexiwudag/gibRgch/1462693263.pdfIn PDF document text
    • https://rigukolanerimi.weebly.com/uploads/1/3/4/5/134519373/841007.pdfIn PDF document text
    • https://nekazadezi.weebly.com/uploads/1/3/4/6/134662300/xodadalewupip.pdfIn PDF document text
    • https://gumevimarijefa.weebly.com/uploads/1/3/1/0/131071167/tewajenoxob_jekedidag_bugojipuzevivi.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/bakejatubakov.pdfIn PDF document text
    • https://cdn.sqhk.co/bularalunop/ijchhMr/777-_200_crew_rest_area.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/pre_calculus_grade_11_teacher_s_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4694dce0-4d1e-4c77-b4da-d1f025f82355.filesusr.com/ugd/fb332b_32e21f7747cd43f991bf75228b313c60.pdf?index=trueIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/46843954465.pdfIn PDF document text
    • http://ruzoguniwu.epizy.com/dovubirinizimelotakadex.pdfIn PDF document text
    • http://xugezibefita.epizy.com/keginijaneze.pdfIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_35043e8f5fea49a29a9e48fd6e93382a.pdf?index=trueIn PDF document text
    • http://pudugivifo.myartsonline.com/understanding_comics_scott_mccloud.pdfIn PDF document text
    • http://kitasiru.epizy.com/data_envelopment_analysis_example.pdfIn PDF document text
    • http://pofumitiko.epizy.com/how_to_solve_cube_tutorial.pdfIn PDF document text
    • http://pofijiserige.onlinewebshop.net/49756471883.pdfIn PDF document text
    • https://d8aee3b0-83ea-4a0d-b8f9-524a85b41d10.filesusr.com/ugd/105b34_eb7d77ddd67041bf92a7b7ce891bfb45.pdf?index=trueIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_9a95495f85194fdc885c6fcc041737c3.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10200 5680 bytes
SHA-256: 8b6de81fb0ec68e8a915ee557effd330e4136f29f070a2ff450073584256614c
font_01_sfnt_off0001154e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154E 11036 bytes
SHA-256: ba26bd8c244d1b4be90920830b19e94decae52d213628e3c8fd7623d4aa6b6bf

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