Malicious PDF — malware analysis report

Static analysis result for SHA-256 81feb1819fe0150c…

MALICIOUS

PDF

74.6 KB Created: 2021-01-20 12:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3708b8deb1c0ed3307e78764745705d0 SHA-1: b85a6422232470638e2dd82bbec1d4a7060fe3cf SHA-256: 81feb1819fe0150c40a27954d053e9921d6fffde17492650c343820ed711e8a4
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://traffset.ru/123?utm_term=delonghi+hmp1500+mica+panel+heater+best+buy PDF link annotation
    • http://pufonorigaji.22web.org/dushman_film_video_song.pdfIn PDF document text
    • https://siduwibe.weebly.com/uploads/1/3/4/7/134775996/favugovuzataze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385620/normal_5fdb27dcb8914.pdfIn PDF document text
    • https://site-1171695.mozfiles.com/files/1171695/delod.pdfIn PDF document text
    • https://site-1246149.mozfiles.com/files/1246149/vunowenerifawowukonuw.pdfIn PDF document text
    • https://site-1172756.mozfiles.com/files/1172756/lirewatudokis.pdfIn PDF document text
    • https://noromilo.weebly.com/uploads/1/3/4/5/134587763/d1ddd201eec55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374953/normal_6004a7e6ea38b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5fbe7d5d2fbaa.pdfIn PDF document text
    • https://borojixupoluba.weebly.com/uploads/1/3/5/3/135316148/11ce55dc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497395/normal_5feaf0872f75c.pdfIn PDF document text
    • https://site-1175847.mozfiles.com/files/1175847/akreditasi_binus_online_learning_sistem_informasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376087/normal_5f8b72ec28c2b.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/bupijila/d_d_4e_artificer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/criminal_movie_song_mr_jatt.pdfIn PDF document text
    • http://jominata.rf.gd/ajeet_singh_songs.pdfIn PDF document text
    • http://buguwotibiven.rf.gd/matawoxesavipi.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/96970306380.pdfIn PDF document text
    • http://lenixad.epizy.com/alloa_athletic_former_players.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B5 5908 bytes
SHA-256: 018ddf48141bee6f819a110b75841563f0fbaaa796293d82430c6fe41a6b9822
font_01_sfnt_off0000f9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B0 10348 bytes
SHA-256: 31b83665aec7e787c6363cf15a2e5b9f4a0eb677ef8dab55ace34675f9c9f5e6

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