Malicious PDF — malware analysis report

Static analysis result for SHA-256 be25b0b43e296da0…

MALICIOUS

PDF

72.5 KB Created: 2021-03-23 16:32:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e5a4d62bce3c3a553a8f26cba1a63d5a SHA-1: 2835af47d354943ea232cd6b4852912e20f6486f SHA-256: be25b0b43e296da0219711b23922e2cfb17b36668b167c839e6223d3e37723dc
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains and redirectors, indicating a link farm designed to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=how+to+make+my+reading+list+private+on+wattpad In PDF document text
    • http://wugupomovupa.sportsontheweb.net/dezuxukajageju.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/qjajjhA/mastercraft_courser_mxt_265_75r16.pdfIn PDF document text
    • http://nufudotaruja.iblogger.org/referazagubepagilobebaz.pdfIn PDF document text
    • http://xufunuduxatene.iblogger.org/58756398296.pdfIn PDF document text
    • https://kolapudavuvoxe.weebly.com/uploads/1/3/4/3/134315715/raxekakosoku.pdfIn PDF document text
    • https://cdn.sqhk.co/libodinidep/XWxrjjf/autotrader_usa_trucks.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/jjjghhh/hunters_league_the_story_of_weapon_masters.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/dorothy_must_die_series_danielle_paige.pdfIn PDF document text
    • http://gegolab.iblogger.org/spinal_anaesthesia_download.pdfIn PDF document text
    • https://pexasojurez.weebly.com/uploads/1/3/1/3/131381046/d70aa29965db.pdfIn PDF document text
    • https://vavaxomutiposev.weebly.com/uploads/1/3/0/7/130738712/satevagubave-vamojavewomu.pdfIn PDF document text
    • https://cdn.sqhk.co/pafitevet/ehhgdgf/88202513225.pdfIn PDF document text
    • http://fosavaxenu.mypressonline.com/astm_a53_grade_b_schedule_40.pdfIn PDF document text
    • http://vobafoselalulor.mypressonline.com/93920543240.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/xobuzidegimitozunugedepa.pdfIn PDF document text
    • http://tesupelaj.sportsontheweb.net/87615974684.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/iiggicl/kodotafa.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/fobia_social_en_nios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kilarosine.atwebpages.com/animorphs_book_21.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/introduction_to_abnormal_child_and_adolescent_psychology_3rd_edition.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/sigmund_freud_theories_of_personality_development.pdfIn PDF document text
    • http://sanebofav.epizy.com/sword_art_online_alicization_lycoris_switch_characters.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_off0000dea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA9 5560 bytes
SHA-256: a1e48db093dc1a4ac78b2c29b67c7f8f1d7247f0fc5ebddf916288e5a5c98fbd
font_01_sfnt_off0000f198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF198 10300 bytes
SHA-256: 70f46334c3afa961099a30f63ee33bcb7719593203dfcc916e4d08c40464c0f7