Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8ee7d35e65603c…

MALICIOUS

PDF

72.6 KB Created: 2021-02-14 17:26:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 449ee64bbce4e13429721a811e6eb211 SHA-1: fd3b097700aa407612ef1a00ad95e049a61f818b SHA-256: aa8ee7d35e65603cec673792674ea30976a88c37dff8c902714d9015dd28b3c9
244 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including linking to known malicious redirector infrastructure and acting as a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest an attempt to redirect users to potentially harmful sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=east+haven+ct+public+schools+employment In PDF document text
    • https://sixebujexe.weebly.com/uploads/1/3/0/7/130740217/jaxojufurinuwotimutu.pdfIn PDF document text
    • http://fimosabu.iblogger.org/62844613675.pdfIn PDF document text
    • https://kisumeselebo.weebly.com/uploads/1/3/6/0/136021012/zavotoxapa_wizaxutataw_tobapevaf_putigojazipog.pdfIn PDF document text
    • https://reseviris.weebly.com/uploads/1/3/5/4/135400779/xogibib.pdfIn PDF document text
    • https://vugadeji.weebly.com/uploads/1/3/1/4/131406436/rilikexapodinumatoso.pdfIn PDF document text
    • https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/92e15e.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/jbUDEl9/shower_with_your_dad_simulator_twitch.pdfIn PDF document text
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/5828268.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/9591049.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/Qhduokz/4_color_card_game.pdfIn PDF document text
    • https://zetodimamewiwek.weebly.com/uploads/1/3/2/3/132302859/vefikot.pdfIn PDF document text
    • https://pexasuwen.weebly.com/uploads/1/3/4/5/134593650/5493005.pdfIn PDF document text
    • http://virepidutajal.iblogger.org/28535470489.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/kDjaZM7/kalula.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/ighgivT/drive_ahead_mod_apk_1._94._1.pdfIn PDF document text
    • https://nisivijuwowog.weebly.com/uploads/1/3/0/8/130813757/5593063.pdfIn PDF document text
    • https://nobarolibefo.weebly.com/uploads/1/3/1/4/131407117/mazozakebipezebumi.pdfIn PDF document text
    • https://jajesawi.weebly.com/uploads/1/3/0/8/130813829/270960ed79a9157.pdfIn PDF document text
    • https://pomorewosijimop.weebly.com/uploads/1/3/2/6/132681296/xakumoguwapaber-wurifapazavuva-majezuwel.pdfIn PDF document text
    • https://tekoboxini.weebly.com/uploads/1/3/0/8/130814877/2555538.pdfIn PDF document text
    • https://nifonafepo.weebly.com/uploads/1/3/5/3/135319448/xezajujom.pdfIn PDF document text
    • https://pesawuzopedeg.weebly.com/uploads/1/3/5/3/135327269/kisuvotemo-rovoxevixavixej-lujepejaku.pdfIn PDF document text
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/pagovuwufosaror_ginewalotofarud_lokawane_nomalojaveg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rovarede.rf.gd/mefomonelejov.pdfIn PDF document text
    • http://kulekedeziwab.epizy.com/diablo_3_necromancer_wings_guide.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_off0000df2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2C 5336 bytes
SHA-256: 991d5ab2e88283283a1ba708e8a1caf2d5e744ff774e2f56a768967344d3dc3c
font_01_sfnt_off0000f13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13D 10264 bytes
SHA-256: 31be7ecfbe1636a64ff16af427f06dc2a2282a3eb83e3c1ebda9d017d5fff3f6

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