Malicious PDF — malware analysis report

Static analysis result for SHA-256 844232a396f2e317…

MALICIOUS

PDF

77.3 KB Created: 2021-04-14 01:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c7ffe01520ca679a1ad27be11cf65ef6 SHA-1: e93d0b24168c3da5735f6926a0d52fcbb35bd6fb SHA-256: 844232a396f2e3174a0a922cb0cf06a3ed40f137e6c3c83c3d784de2e9a054dc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://bologen.ru/strik?utm_term=dewalt+pressure+washer+surface+cleaner+head+size+18+inch PDF link annotation
    • https://cdn.sqhk.co/jenojigise/fgjSrjg/zigokipimopa.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/gchaji4/stickman_dismounting_2._2._1.pdfIn PDF document text
    • https://womogidukiwu.weebly.com/uploads/1/3/4/8/134873304/judutem-gajamozok.pdfIn PDF document text
    • http://julugemuzejib.22web.org/wunez.pdfIn PDF document text
    • https://cdn.sqhk.co/losegiro/iegc2hf/wonuxi.pdfIn PDF document text
    • http://jirobanu.22web.org/agro_informatics_definition.pdfIn PDF document text
    • http://store50off.info/how_to_unlock_tracfone_moto_g634er2.pdfIn PDF document text
    • http://lafovawolifi.22web.org/xobibisig.pdfIn PDF document text
    • https://natevifenug.weebly.com/uploads/1/3/5/9/135986161/zalazujep.pdfIn PDF document text
    • https://jesipawuba.weebly.com/uploads/1/3/0/8/130874316/sulovu.pdfIn PDF document text
    • http://masalev.ru/ddp_yoga_free_workoutzct0a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://varaxobosovugi.rf.gd/xosad.pdfIn PDF document text
    • http://jovagerebof.rf.gd/kamus_bahasa_jawa_indonesia.pdfIn PDF document text
    • http://mosakokomu.epizy.com/physicians_desk_reference_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c690760-55c7-4a29-ac63-23a4d17c79a7/18293202822.pdfIn PDF document text
    • http://varudejeb.epizy.com/94246995982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c1a69e-a2e8-4a4d-84b5-b53e7996c404/is_harrisons_principles_of_internal_medicine_good.pdfIn PDF document text
    • http://xivobotaxonid.epizy.com/88156388020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b43c732a-46c2-488a-805a-069a08199836/2000_ford_ranger_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6624150-a721-4523-813a-403541596798/15410750545.pdfIn PDF document text
    • http://xuvotawelotito.epizy.com/muzijikativoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be49f9c-a232-45fd-9f54-05217ba6c7e6/best_tv_programmes_to_learn_english.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_off0000eedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDB 5628 bytes
SHA-256: 947b3c0878b5f368a9896b1a59b2647d5947419e71816c0f89c9aa17f7c66cd3
font_01_sfnt_off00010222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10222 10916 bytes
SHA-256: 7d0a1d46ff69cc24e711bb1edc1db3b3dcaf5170e2f80eb3acdcabbfb24762bb

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