Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63b9f49bed017a3…

MALICIOUS

PDF

77.5 KB Created: 2021-02-01 09:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6026479ec67173dd705e6fd16e48520f SHA-1: 46df66bbc519df1ec3edf459f16210b417c5a691 SHA-256: a63b9f49bed017a3bfc08a60846a496ff1b326b6e680ddd9482e79a314db35c7
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a specific product search term in one of the URLs indicates a targeted lure. ClamAV and ML classifiers confirm its malicious nature, likely as a phishing or malware distribution vector.

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://baarspo.ru/123?utm_term=glidden+porch+and+floor+paint+dark+grey PDF link annotation
    • https://cdn.sqhk.co/lawafopugu/w8icWwd/fudakanunukaluropamekazir.pdfIn PDF document text
    • https://leniwexobopusez.weebly.com/uploads/1/3/4/7/134713406/7465764.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/BjcgdxL/youtube_video_downloader_for_pc_free.pdfIn PDF document text
    • https://kotutoxegaru.weebly.com/uploads/1/3/2/6/132695780/jefilopaz-poxenesuvexas-gibegakujuto-tagodudumo.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/ijjelhh/46564258705.pdfIn PDF document text
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/gafupogetivunat_foboto_pimuwuwa.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/63acde0d6eb555f.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/hiifPlC/vikifose.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/idhJjff/cinemark_peru_san_miguel.pdfIn PDF document text
    • http://bigtittybella.com/57657752192brk11.pdfIn PDF document text
    • https://dexekuweda.weebly.com/uploads/1/3/4/7/134705305/vamizexenixiporefepa.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://suwulinivez.rf.gd/tafuwiteliw.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/95890345358.pdfIn PDF document text
    • http://xumusemowujev.epizy.com/great_alternative_keyboard_for_android.pdfIn PDF document text
    • http://moniladipawi.epizy.com/86701980908.pdfIn PDF document text
    • http://pasufok.rf.gd/shaapit_movie_songs_pk.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/reported_speech_optional_back_shifting_espaol.pdfIn PDF document text
    • http://kirawolus.rf.gd/10264938455.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/attendance_tracker_excel_template.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_off0000e428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE428 5224 bytes
SHA-256: 8f26a63b7bba8c50ff699ed9cc3cfb3c04739e325d9c36849078923f3d8ab0ea
font_01_sfnt_off0000f5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E5 10804 bytes
SHA-256: 81c8402b5a589ee519359d7755b848813d83684a286c0d11404aade11167e077
font_02_sfnt_off00011a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A77 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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