Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2977484dbbb92a6…

MALICIOUS

PDF

80.5 KB Created: 2021-01-06 16:15:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d02e723840084f80a7d4e5fa7dd4cea8 SHA-1: 73677dd96655bca2df52a430f656d64462d6531f SHA-256: f2977484dbbb92a6b4055141e04687eb05c58a85f9e16590a00067dffc8ade68
254 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic indicating it redirects to known malicious infrastructure, specifically 'https://ggtraff.ru/aws?utm_term=messenger+lite+updated'. The document body, though heavily obfuscated, suggests a lure related to 'Messenger lite updated'. The presence of numerous external PDF links, some pointing to S3 buckets, further supports a link-farming or redirection-based attack. The ML classifier also strongly flagged this PDF as malicious.

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
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ggtraff.ru/aws?utm_term=messenger+lite+updated In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476418/normal_5fbb04245d7da.pdfIn PDF document text
    • https://juzomewe.weebly.com/uploads/1/3/4/3/134350864/fopobutoliresuzitef.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/avgh6jc/prison_break_season_3_cast_gretchen.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/Wgjhbpw/best_bass_songs_2019_rap.pdfIn PDF document text
    • https://vogitoroxubas.weebly.com/uploads/1/3/0/7/130739894/15a272.pdfIn PDF document text
    • https://cdn.sqhk.co/jisujesox/frjb5hf/memidizojobisaruvejuzije.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/QZjcuq1/31315674108.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/muwimemupegarofudax.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/nalifij/13358137202.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/mods_for_minecraft_pe_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/lucky_kabootar_song_djpunjab.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/dawn_of_war_ultimate_apocalypse_tyranids_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/80685820751.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_off0000f29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29D 4904 bytes
SHA-256: 63fa8ff4297561f28ff249a8e08f4ba74830ff98c8654468da2a2342fddf43ca
font_01_sfnt_off00010350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10350 10612 bytes
SHA-256: ed9f9ae4f04fe917d8d40a24b8deadc6da98d3616a64567cebb6c562a0ea0442
font_02_sfnt_off0001276b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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