Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a571eeba78c8a2e…

MALICIOUS

PDF

73.7 KB Created: 2021-03-02 17:21:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6c0a73092032f0f11f7da55cb231d7b3 SHA-1: 5c8aef1774e8f87bdec965b6f98a890c524ba4a9 SHA-256: 7a571eeba78c8a2eb43d1b1cc570697d279d76f9ee2b74747daa804bee4ced64
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and one specifically linked to a search term for a popular gaming accessory. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of multiple external URIs and a link farm heuristic suggests an attempt to redirect users to malicious sites.

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://nipisod.ru/strik?utm_term=astro+a20+wireless+xbox+one+edition PDF link annotation
    • https://vipobonufemug.weebly.com/uploads/1/3/5/4/135401160/pevutibusiko-dukolitikapozog.pdfIn PDF document text
    • https://faxipanonuk.weebly.com/uploads/1/3/4/3/134352952/gukutoz-sunuzudu-voruduk.pdfIn PDF document text
    • https://nukivobiwej.weebly.com/uploads/1/3/4/0/134016752/digavixudumije.pdfIn PDF document text
    • https://xemegejimeje.weebly.com/uploads/1/3/1/6/131636808/jekenepexaretonile.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/eig26hc/bubble_tea_recipe_with_flavor_powder.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/satezakojedipa.pdfIn PDF document text
    • http://lifeit.pro/tanimug9rcuj.pdfIn PDF document text
    • http://hookup153.space/29006390543xju2d.pdfIn PDF document text
    • https://ronudinogem.weebly.com/uploads/1/3/1/3/131398573/7628196.pdfIn PDF document text
    • http://sreview.online/31574662985nbmsg.pdfIn PDF document text
    • https://menesifewo.weebly.com/uploads/1/3/0/8/130814293/d8c88.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/XjjBih0/zosifipepame.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuneduzib/ihgiq6i/algoritmo_de_dijkstra.pdfIn PDF document text
    • http://talemine.getenjoyment.net/practice_makes_perfect_english_verb_tenses_up_close_download.pdfIn PDF document text
    • https://guvizetajujuwu.weebly.com/uploads/1/3/4/6/134617183/wipavuvewazuvodigeje.pdfIn PDF document text
    • https://mepubigavij.weebly.com/uploads/1/3/4/5/134599646/eebe3ad6bb.pdfIn PDF document text
    • http://afracheat3.xyz/nadaxetumasoridodusepgtd0.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/2aFJghx/bowl_over_idiom_synonyms.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xowevabi.epizy.com/review_buku_awaken_the_giant_within.pdfIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/how_to_garden_vegetables_at_home.pdfIn PDF document text
    • http://banitazivi.epizy.com/machiavelli_discourses.pdfIn PDF document text
    • http://lotawovuvowuk.rf.gd/craftsman_bolt_on_20_volt_battery_charger.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_off0000dc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC56 5384 bytes
SHA-256: d9f0bf18ce477ee3d0a84659c9e23ab0cf73e6e68361d0b78c1a128fb14b509a
font_01_sfnt_off0000eec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 12424 bytes
SHA-256: ede650bab028eca29e5312fb925aa128a272517af873a77cbba62da65cd28dd5

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