Malicious PDF — malware analysis report

Static analysis result for SHA-256 170f03b32047f027…

MALICIOUS

PDF

89.3 KB Created: 2021-03-14 22:21:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f93572bec8ccf91c6405d5513a6fbec6 SHA-1: a56011c7082fd940302693aa40908c894f692ddb SHA-256: 170f03b32047f027e2ad2646afb8a114bae1c3a8f661f115af91dc95bdc9190c
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 pointing to disposable hosting services, indicating a link farm designed to manipulate search engine results or direct users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://gimoguvi.ru/strik?utm_term=why+is+my+hp+printer+printing+blank+pages PDF link annotation
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/7539841.pdfIn PDF document text
    • https://cdn.sqhk.co/mopofosak/kGawtrX/gucci_belt_size_guide_womens.pdfIn PDF document text
    • https://cdn.sqhk.co/bafujifi/ighg51J/ravorutedisomofaribax.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/x6gdije/forokuxulelalufagetunen.pdfIn PDF document text
    • https://xugibadibexupov.weebly.com/uploads/1/3/4/6/134684970/fosezekupem.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/gchejdg/hexagon_saturn_changing_colors.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/iji0iiN/96504371261.pdfIn PDF document text
    • https://xumagatovonag.weebly.com/uploads/1/3/5/3/135312495/1172482.pdfIn PDF document text
    • https://jepejopik.weebly.com/uploads/1/3/4/6/134610321/rimidut.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/bljaAEq/entergy_texas_business_login.pdfIn PDF document text
    • https://fejopipuzag.weebly.com/uploads/1/3/4/3/134308805/lowodidanabo.pdfIn PDF document text
    • https://barijimuje.weebly.com/uploads/1/3/1/4/131406344/jisetetejemame.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/gige9gC/ipl_live_cricket_match_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/hiDgMSP/unlimited_coin_ludo_king_apk.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/fodomowumorurisemubul.pdfIn PDF document text
    • https://tiforunu.weebly.com/uploads/1/3/1/4/131437018/7282822.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/HSjeHgj/57517401372.pdfIn PDF document text
    • https://baputopozim.weebly.com/uploads/1/3/5/3/135336161/2634827.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/2001_jeep_grand_cherokee_limited_owners_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/dikonutudibe/bigA1g5/pokemon_tcg_card_value_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/lusozinexigaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/divinity_original_sin_1_character_creation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/bavotunalejusuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/42107611262.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/bajirao_mastani_songs_tamil_starmusiq.pdfIn PDF document text
    • http://wepogevadapafa.atwebpages.com/penekaj.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_off00011ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC6 5552 bytes
SHA-256: 6aee6fb7d238b800d0e073ca2e4e67048e413e2d5424a786b071d3b572b1c9bf
font_01_sfnt_off0001318d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318D 11176 bytes
SHA-256: 59c52735ac492c1a4019941f6d39467a965f99d3a4c11686a61dcdd2a22112bb