Malicious PDF — malware analysis report

Static analysis result for SHA-256 900888a1d406303c…

MALICIOUS

PDF

77.4 KB Created: 2021-03-26 07:53:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fc1d7aea4f56c6f875eb27a187c744ab SHA-1: b523a417945b347a8ceb97f22fc44cea6781c217 SHA-256: 900888a1d406303c34988c02fedf14fc2c1fcb6ec1cbfeb64469d6f217118967
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 of which point to disposable domains and link farms, indicating a likely phishing or malware distribution scheme. The document body, though heavily corrupted, suggests a lure related to a 'Magic chef rv range manual', which is likely a pretext to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/wix?keyword=magic+chef+rv+range+manual PDF link annotation
    • http://ch-bewertung-2888.xyz/tazizuvubejezibuve64j.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/ijjdjaG/novimibaliwugedefifi.pdfIn PDF document text
    • http://vuvuga.xyz/constitucin_mexicana_artculo_110a6xkb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462985/normal_5fe0d9491f438.pdfIn PDF document text
    • https://xanojamazifedim.weebly.com/uploads/1/3/5/3/135323589/lapixokel-ruwoto.pdfIn PDF document text
    • http://usechambre.xyz/vajalexivenedejaribuvamdvcl.pdfIn PDF document text
    • http://vzroslyh.net/zunodipizijavef3619.pdfIn PDF document text
    • http://getveran.site/34075437903rnh4n.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/hae05XJ/significado_de_autopista_en_informatica.pdfIn PDF document text
    • https://cdn.sqhk.co/lewatesudo/7rm2xih/zaxavuposomimadebo.pdfIn PDF document text
    • http://tehnopolis.org/attack_on_titan_movie_live_action_trailerhfxy5.pdfIn PDF document text
    • http://birjand.design/emergency_preparedness_merit_badge_answer_keyut2tp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455176/normal_60570b4cd64c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493602/normal_5ff4c3db50a16.pdfIn PDF document text
    • http://devlp.design/7811394708opk1b.pdfIn PDF document text
    • https://bopilopuneliniw.weebly.com/uploads/1/3/5/3/135304065/7565573.pdfIn PDF document text
    • https://cdn.sqhk.co/demanajinu/UQjehX1/black_dragon_snake_plant_for_sale.pdfIn PDF document text
    • http://businesslinecenter.com/dukaxap4sr8i.pdfIn PDF document text
    • http://winfreeiphone.xyz/graphing_linear_equations_worksheet_answer_keyhr330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485445/normal_5fd76d9e4a2d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427268/normal_5fcb0d8743aa1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425909/normal_5ff4d4035349f.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://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_off0000e351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE351 4876 bytes
SHA-256: 63160c9c63e60c17e93889513b06a63e9bba4e9accfb3b2ee0e4e2713dd24cbb
font_01_sfnt_off0000f3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B5 11004 bytes
SHA-256: 0c4eae6edd886809462577bf0d6955249229a0ff9d3e82ece0996d98c7f8eb26
font_02_sfnt_off000118a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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