Malicious PDF — malware analysis report

Static analysis result for SHA-256 957178836b0dca72…

MALICIOUS

PDF

84.7 KB Created: 2021-03-19 21:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a522923fdd9f4b1ce324603761c7aa51 SHA-1: d4bb9c3dee2a9c2e49f48a8bcc6cadc8841eccc9 SHA-256: 957178836b0dca725fa9af1dbe5e5737e939acb83f878c3ee0dc497431ec050c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'California bearing ratio test report', likely to disguise the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/123?utm_term=california+bearing+ratio+cbr+test+report PDF link annotation
    • https://dugepenen.weebly.com/uploads/1/3/1/3/131379306/9782579.pdfIn PDF document text
    • https://wuxavuzipirugud.weebly.com/uploads/1/3/4/0/134012349/72abbe9582ebe.pdfIn PDF document text
    • http://xemepuvaxeliv.iblogger.org/star_trek_discovery_season_3_episode_9_cast_carl.pdfIn PDF document text
    • https://tesurupijirixu.weebly.com/uploads/1/3/0/8/130813669/433996.pdfIn PDF document text
    • https://purotuduveb.weebly.com/uploads/1/3/0/7/130738796/6cc317aa3de8cc8.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/nejhcid/best_offline_music_player_for_iphone_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kemuxilajig/rPiidKI/temok.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/misesuw.pdfIn PDF document text
    • https://mobesometug.weebly.com/uploads/1/3/4/6/134644263/2370123.pdfIn PDF document text
    • https://xufipenisugiw.weebly.com/uploads/1/3/0/8/130873979/53d3a.pdfIn PDF document text
    • http://januvasiw.22web.org/cursos_de_ingles_en_miami_gratis.pdfIn PDF document text
    • https://moxigowa.weebly.com/uploads/1/3/0/8/130814106/gisexujutajabulapox.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/giOW1oO/larva_word_2400.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
    • http://sisumosunozudot.epizy.com/pakevafeleguwegibenewet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b67b7ca-a976-4bca-8dff-1d3999f4382c/yamaha_golf_cart_manuals_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4c47886-6d19-49c6-96a9-c232e79758a3/roland_spd-sx_sampling_pad_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d772b7e0-2c0d-4724-945f-793c638758fd/craftsman_lt1000_riding_mower_parts_diagram.pdfIn PDF document text
    • http://laganomezavarof.epizy.com/lg_vs980_g2_phones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/814f412d-a99f-4c60-8c31-539f53a80580/43045935559.pdfIn PDF document text
    • http://xopemaw.rf.gd/russian_alphabet_cursive_letters.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/rijezim.pdfIn PDF document text
    • http://solidugugisasid.epizy.com/eventide_h9_max_vs_core.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE889 5132 bytes
SHA-256: 0e182cb164792c33b5f47f8cf214398c08ae741dea9722991a5dacb9de0be780
font_01_sfnt_off0000fa0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0B 11516 bytes
SHA-256: 984ee1be5151b9b7ae4a6c520c170df6cab118030e6e94fbce5cf31c62434d36
font_02_sfnt_off000121cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CF 16128 bytes
SHA-256: c43ad50ec66e81af56c40a1c7423ef9cb95b6c4caf81e6c8e5436153ffae3c43
font_03_sfnt_off000136bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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