Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9a028bd9a8b223…

MALICIOUS

PDF

77.2 KB Created: 2021-04-18 10:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2b5d1f8f9a16dcd44840ad5d51ad5167 SHA-1: ea31cd4e124b917f4680728bd25dbec83df39e18 SHA-256: 9e9a028bd9a8b2232447cd455e7817117d5c4dd09b4c874f16c3d4d9352c7c24
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URLs and the document body, though heavily obfuscated, point towards an attempt to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=how+to+make+plan+elevation+and+section+in+autocad PDF link annotation
    • http://sebowiwuzoso.iblogger.org/kemovusafatumof.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/238242244.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/Mjdjaje/kesivusaruwadalikutet.pdfIn PDF document text
    • https://cdn.sqhk.co/verikiweneza/edyNyjg/health_bracelet_app_for_android.pdfIn PDF document text
    • https://gigatadozewat.weebly.com/uploads/1/3/1/6/131606492/ligixikubomu_xagoj_suxatanokob.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/qgcIMWX/kutifiwopowux.pdfIn PDF document text
    • https://jimatekazame.weebly.com/uploads/1/3/4/6/134669874/812829.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/R00bQku/seesaw_app_clipart.pdfIn PDF document text
    • https://cdn.sqhk.co/libewepigux/ihjsbhd/boater_exam_answers_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/hehifqR/blood_money_meaning_in_arabic.pdfIn PDF document text
    • https://cdn.sqhk.co/wisewuguv/jibggif/galaxy_watch_active_2_bands_size.pdfIn PDF document text
    • https://kikoxelila.weebly.com/uploads/1/3/4/3/134335894/9317444.pdfIn PDF document text
    • http://zusagukitu.mywebcommunity.org/algerie_ferries_programme_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/93947494165.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/gisexasufuwavorerigumiz.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/folasuw.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/when_did_islam_come_to_europe.pdfIn PDF document text
    • http://xubibufopude.epizy.com/libros_de_fisica_2_secundaria.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_off0000f173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF173 5300 bytes
SHA-256: 08ff8ac030f37e835c2933bb9596dd241c91632091f2c924950aa9d517ebe743
font_01_sfnt_off00010380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10380 10464 bytes
SHA-256: 9daf2a0ce1d226642adde5ed9d28a7adf46370b0e97942b79cbb37ef99f6b7a2

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