Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9f54ab7b4276c2…

MALICIOUS

PDF

79.2 KB Created: 2021-02-11 14:14:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 66e50a3c6f7c0a16f2299970c4014ca9 SHA-1: 380d8e2c4e9d3750c414392753879d1ba42c48e0 SHA-256: ff9f54ab7b4276c2a9073e64e2515c6134413c49de97222cbb12e592f8453fdd
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be related to search engine optimization lures like '3ds max 9 crack free'. No scripts were extracted, but the PDF structure and link farm behavior are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/aws?utm_term=3ds+max+9+crack+free PDF link annotation
    • https://cdn.sqhk.co/ponesigis/wiifvij/mlb_playoffs_scores_2018.pdfIn PDF document text
    • http://7gusevshop.space/devil_s_advocate_full_movie_mp4ji3f0.pdfIn PDF document text
    • http://gujafitixa.iblogger.org/98244746228.pdfIn PDF document text
    • http://jakor.pro/how_to_beat_sephiroth_in_kingdom_hearts_2.5aj1az.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/kQhah4j/xakurevijukuxedapiduzopu.pdfIn PDF document text
    • http://kuxasubofutako.iblogger.org/mububuvox.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/EgoNjjL/allens_snakes_vegetarian.pdfIn PDF document text
    • http://eroganoficial.site/videos_like_de_amor_cortosvbh4s.pdfIn PDF document text
    • https://gigufeti.weebly.com/uploads/1/3/4/6/134633464/5c5804.pdfIn PDF document text
    • http://trenketo.buzz/1502899912175h9.pdfIn PDF document text
    • https://mukojemugasab.weebly.com/uploads/1/3/5/3/135314074/sutaxugujerip_sibinukakenifut_nejamoromu_kitedirokenu.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/hcFhfja/scor_pal_mini.pdfIn PDF document text
    • https://kiteginizi.weebly.com/uploads/1/3/1/8/131871518/zowipakexo-kegutomi-ririse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://getakufo.epizy.com/format_float_to_two_decimal_places_javascript.pdfIn PDF document text
    • http://gikutixutawax.epizy.com/x1_carbon_8th_gen_datasheet.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_off0000e481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE481 4584 bytes
SHA-256: 3313727f5acc94c9bd45cfb621542ea1adf4c45c57c7b509e0c3315928ee85c4
font_01_sfnt_off0000f4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D6 5492 bytes
SHA-256: 92360aeb7fe653003eff9c604a0e74418a09cae1aec975725df41f299049d06c
font_02_sfnt_off00010771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10771 12116 bytes
SHA-256: 1db2f543309327d572f37276a0524cb8f720643bd931898421833fcb2252d26e

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