Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf2c21cd6229488f…

MALICIOUS

PDF

75.7 KB Created: 2021-03-22 12:31:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 00ec8dfdd1de17b708e8aef217ef5aa2 SHA-1: 25e56784f5643efdebb0058d9f51c8c403044945 SHA-256: bf2c21cd6229488fbd714ef82714d449a8d4ddc702a6ca6a3b5287cf35eb1c04
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, indicating a link farm or SEO manipulation tactic. ClamAV detected it as Pdf.Phishing.Trojan, and ML classification strongly suggests maliciousness. The embedded URLs likely serve as lures or redirect to malicious content, potentially related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://seumenha.ru/strik?utm_term=planting+and+growing+red+potatoes PDF link annotation
    • https://cdn.sqhk.co/tazifawixax/HPgd3q0/how_to_loot_game.pdfIn PDF document text
    • https://vimudizod.weebly.com/uploads/1/3/4/6/134632239/gukaronejogu.pdfIn PDF document text
    • https://cdn.sqhk.co/rodesedaded/jdieHhe/86062180104.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/crown_xti_4002_review.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/vemovakis.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/jJjcgd8/vogedojafokerasibe.pdfIn PDF document text
    • https://mikugixu.weebly.com/uploads/1/3/1/4/131438693/dorebosegolib.pdfIn PDF document text
    • https://nulabelavomeviz.weebly.com/uploads/1/3/1/4/131413951/muvifidepibiwi.pdfIn PDF document text
    • http://vumamanepu.sportsontheweb.net/certified_supply_chain_professional.pdfIn PDF document text
    • https://zinobelusetepi.weebly.com/uploads/1/3/5/3/135318062/7456273.pdfIn PDF document text
    • http://dirupomavi.iblogger.org/new_jersey_surf_report_magicseaweed.pdfIn PDF document text
    • https://sajadarazaga.weebly.com/uploads/1/3/4/3/134340855/d3bb0a4960.pdfIn PDF document text
    • https://risegutu.weebly.com/uploads/1/3/4/2/134265716/9faf62aef.pdfIn PDF document text
    • http://lesuxofozadize.mygamesonline.org/malovewenixanagutudulesa.pdfIn PDF document text
    • http://pojibuvuj.mygamesonline.org/jeffrey_eugenides_the_marriage_plot.pdfIn PDF document text
    • https://ledapenilodaro.weebly.com/uploads/1/3/1/0/131070651/xawidagokimuwitepabe.pdfIn PDF document text
    • https://migawireradafus.weebly.com/uploads/1/3/2/6/132695569/lirowawomisarenagixo.pdfIn PDF document text
    • http://leludezoz.scienceontheweb.net/nutritional_importance_of_carbohydrates.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/what_math_is_used_in_aerospace_engineering.pdfIn PDF document text
    • http://voruxajalo.iblogger.org/ayyappan_songs_free_download_tamil.pdfIn PDF document text
    • https://gebipobewixaduk.weebly.com/uploads/1/3/4/6/134631326/aa3b19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rojanesifilagu.myartsonline.com/wheel_of_time_cast_lanfear.pdfIn PDF document text
    • http://pesogulovuxolub.rf.gd/46105257942.pdfIn PDF document text
    • http://fodapimogu.rf.gd/new_employee_onboarding_template.pdfIn PDF document text
    • http://nexolep.rf.gd/keto_diet_meal_plan_for_beginners.pdfIn PDF document text
    • http://futebowa.atwebpages.com/spanish_grammar_in_review_answer_key.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_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 5220 bytes
SHA-256: dc4a26ae2c327e45ce25964c6c4b706e59b1e3155220226ab321540f1f631a8f
font_01_sfnt_off0000fc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC91 10720 bytes
SHA-256: 474b81096b109cb5eb5ad64fce848dddce9bdc43964565733c3b454f9f88b851