Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f49ce90803512d…

MALICIOUS

PDF

94.2 KB Created: 2021-04-01 14:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 76bda4fd668a542cd14e3b82bf6d9feb SHA-1: 15e7d64d0122c563f817f646c76aa6e73efe3364 SHA-256: 33f49ce90803512d6fc9644f9a7a5ceabbecc984571b56ffd6e40bba7229f5a2
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically identified as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or redirection mechanism. The embedded URLs likely lead to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=cantico+delle+creature+stella+pdf PDF link annotation
    • https://mevukufidax.weebly.com/uploads/1/3/1/3/131379039/8e0c35f4.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/iihhgri/empire_rush_rome_wars_tower_defense_mod.pdfIn PDF document text
    • https://dumuzuvo.weebly.com/uploads/1/3/4/6/134695275/fopagelevosumil.pdfIn PDF document text
    • https://demijejave.weebly.com/uploads/1/3/4/6/134607426/3106857.pdfIn PDF document text
    • https://cdn.sqhk.co/boxewemutox/g6jjDtg/business_administrator_job_description_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/gHyPlgc/i_10_gladiatori_film_completo_italiano.pdfIn PDF document text
    • https://fefaxositepimu.weebly.com/uploads/1/3/3/9/133986539/6766699.pdfIn PDF document text
    • http://civiliscmq.online/lakakumipivajavufuxiwomigf8aeq.pdfIn PDF document text
    • http://ibkreactiva2020.com/aruba_ap_365_datasheet4kxrk.pdfIn PDF document text
    • https://vogunuwar.weebly.com/uploads/1/3/4/8/134887333/jetapugimelur_nezet_bonazelepa.pdfIn PDF document text
    • http://joy-todays.online/rifopokozaximozovawodovv4leo.pdfIn PDF document text
    • https://kitedagipan.weebly.com/uploads/1/3/4/8/134892955/feriridujixobuponej.pdfIn PDF document text
    • https://cdn.sqhk.co/fonazovep/wgShapd/fishing_hook_knots.pdfIn PDF document text
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/rojago.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
    • https://s3.amazonaws.com/gavobawum/tavem.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/30131780846.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/the_true_story_of_the_three_little_pigs_summary.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_off00012385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12385 5052 bytes
SHA-256: fcdc23e0de9f7d28e59830508e72393bea06b44e55bd4a519fdb0c861579a607
font_01_sfnt_off000134b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B9 12756 bytes
SHA-256: 19d44e89a1420f2d716326cc59f90a139e0fca46a72284c4a4a4801c66191f2d
font_02_sfnt_off00015d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D49 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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