Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29ca4f80b9469b3…

MALICIOUS

PDF

76.1 KB Created: 2021-03-10 05:08:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ebdca634ec058c2e63fe157f42b39cc SHA-1: eecd31340dee07ed72b6fed7dd9cf552dc0a55f3 SHA-256: d29ca4f80b9469b3140aea8524782cdf5a077cefdf687162bee716484bb4f65f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, and one prominent URL is designed to mimic a search result, likely to trick users into visiting a malicious site. The presence of external URIs and link farm characteristics indicates a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://soxebez.ru/aws?utm_term=words+that+start+with+n+to+describe+someone+in+a+nice+way
    • https://jabefebilinoke.weebly.com/uploads/1/3/0/7/130739415/8733065.pdf
    • http://copyright-security-ig.com/halimbawa_ng_accomplishment_report_sa_filipinoqx0f5.pdf
    • http://helpcreditscore.info/voburesarunedopapokouvojv.pdf
    • https://repositugi.weebly.com/uploads/1/3/0/7/130738607/nemij.pdf
    • http://studyweb.site/honda_power_equipment_eu2000i_inverter_generator_reviews3xi6e.pdf
    • http://itfamily.info/bahubali_1_video_songs_in_tamillz9fd.pdf
    • https://vazigawexike.weebly.com/uploads/1/3/1/6/131606690/23666.pdf
    • http://fresh-ita.space/judinipelorugentew99.pdf
    • https://cdn.sqhk.co/jemitaso/SCCsSge/skylands_arena_nj.pdf
    • https://kewenarizifosiz.weebly.com/uploads/1/3/6/0/136092989/34ebb.pdf
    • https://cdn.sqhk.co/fiseguvugele/aXnMGkI/75360655216.pdf
    • https://cdn.sqhk.co/jixuvepabu/hekqge9/runner_duck_breeding_season.pdf
    • http://freshka.fun/31157302221lt0vy.pdf
    • https://cdn.sqhk.co/mafowixodi/iihjhca/psoriasis_treatment_algorithm.pdf
    • http://myfavoritesun.xyz/monosaccharide_disaccharide_polysaccharideggbi0.pdf
    • https://cdn.sqhk.co/nitunoda/Tjiibia/snake_2020_fortune.pdf
    • http://dietnatur.fun/chita_chola_songs._pk5re0h.pdf
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/1afb88f1b41fa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lilobemo.epizy.com/zexakovowi.pdf
    • http://zugujegezamuto.epizy.com/12th_new_english_guide_free.pdf
    • https://s3.amazonaws.com/lotibabakuj/soxolirimulajediwejo.pdf
    • https://s3.amazonaws.com/fexuror/the_foggy_dew_sheet_music.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf3.bin
8b1d20191c51c4d32bcbdcaef5f1d5eeacde8851ea278effc32146eed81a1a65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF3 5496 bytes
font_01_sfnt_off0000fd92.bin
6305e185be3fcafcde330fa23ac194fb8964f294f8c7fbcaf960ab830d05764b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 10948 bytes

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