Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0491b3e552e467…

MALICIOUS

PDF

74.3 KB Created: 2021-02-27 20:52:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7bed75630639f50d369ecd4712d383b6 SHA-1: 0eca2cc3e374036047f70166b9a2b1b577ee9923 SHA-256: 1c0491b3e552e4678c6fb9087c0248c1263057c7e57c20781907536e51cfddb9
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 external URLs, many hosted on disposable domains, suggesting a link farm or redirection infrastructure typical of phishing campaigns. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct textual lure is discernible. The presence of embedded URLs and the overall structure strongly indicate a phishing or scam attempt, likely using the embedded links to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/award?keyword=marantz+cassette+deck+sd4050 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4492278/normal_5fce88a41f00b.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/40203074520.pdfIn PDF document text
    • https://bakuzasopawej.weebly.com/uploads/1/3/1/4/131408369/8044299.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/how_to_replace_igniter_on_englander_pellet_stove.pdfIn PDF document text
    • http://punejew.mygamesonline.org/denanulejuxidod.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/zetogulupikapol_lujazefepon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408188/normal_5ffce3f3382f1.pdfIn PDF document text
    • https://gufiferufa.weebly.com/uploads/1/3/2/3/132302963/nemanodugemuva.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/xofire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458615/normal_603714888e791.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/jhdeghZ/best_islamic_quotes_in_urdu_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412396/normal_6028ad480b7d7.pdfIn PDF document text
    • https://wojumujar.weebly.com/uploads/1/3/5/3/135396772/lowevivejo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://letotake.epizy.com/garanasufoki.pdfIn PDF document text
    • http://jefebewo.epizy.com/listening_skills_test_prep_escape_answer_document.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/causes_of_air_pollution_in_china.pdfIn PDF document text
    • http://kusukod.epizy.com/what_are_starbucks_handcrafted_espresso_drinks.pdfIn PDF document text
    • http://lexaxixamu.rf.gd/spider_man_games_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/zudasigagujijekamopiwatux.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/hotterdog_jumper_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/29758456551.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D5 5376 bytes
SHA-256: eb5363e5d58bea3790a8d456188d01e3a155e2d66e47b4ee33ae6ef92649a346
font_01_sfnt_off0000f84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84A 10432 bytes
SHA-256: c4861883294e72a6988e479a02a00dc0bd623c5f7d69adf890a5321e298e6f7c

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