Malicious PDF — malware analysis report

Static analysis result for SHA-256 abde1b04b6db8859…

MALICIOUS

PDF

80.3 KB Created: 2021-02-18 03:53:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8ebb4302ee1b93056ab15ee24d944d0f SHA-1: e3c869b2676bf5cd92cb0f5a878f48be5402f7bc SHA-256: abde1b04b6db88590179c6e1b5d45096b8634f7b21736985dbf7c787edbf6d29
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the presence of numerous external URIs points to an attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=shure+ulxp4+microphone PDF link annotation
    • https://cdn.sqhk.co/wuvinudubuno/jnIYpak/amazing_powerhero_new_york_gangster_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/HhiIxKU/kotebegiraropodowisir.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/1Zbhepy/playspot_make_money_playing_games_download.pdfIn PDF document text
    • https://vabuxijipureg.weebly.com/uploads/1/3/4/4/134476882/12e2aaa.pdfIn PDF document text
    • https://nutiduvurenomal.weebly.com/uploads/1/3/4/6/134681926/6257495.pdfIn PDF document text
    • https://gilanevevo.weebly.com/uploads/1/3/0/7/130739192/2cbe565ef4cb.pdfIn PDF document text
    • https://nutifikidejuz.weebly.com/uploads/1/3/4/3/134347692/4373427.pdfIn PDF document text
    • http://opsnatur.fun/20089802594czik5.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/Pv5jeji/photo_editor_for_pc.pdfIn PDF document text
    • http://tryporte.xyz/dead_island_highly_compressedz8u85.pdfIn PDF document text
    • https://xukizawumu.weebly.com/uploads/1/3/1/3/131380236/sozavikim.pdfIn PDF document text
    • https://xejapekedom.weebly.com/uploads/1/3/4/8/134864907/boginupunifesol.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/temujonuwu/what_does_it_mean_when_your_beats_wireless_are_blinking_red.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/jubiledobikudot.pdfIn PDF document text
    • http://zagawajali.epizy.com/anbanavan_asaradhavan_adangadhavan_full_movie_1080p.pdfIn PDF document text
    • http://vobuxex.epizy.com/chevy_malibu_led_lights.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/58389287874.pdfIn PDF document text
    • http://lafeseg.rf.gd/78097185071.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_off0000f9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A2 5044 bytes
SHA-256: 2583e43e77ad94c70851a7f8b95adc17cf964bb6893f02ef533addd5833a40ea
font_01_sfnt_off00010ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB6 12620 bytes
SHA-256: b2c141af47ab29b3cf3415f7ea72ae284cd5fffcb2a5d91128778f5b8c295c84

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