Malicious PDF — malware analysis report

Static analysis result for SHA-256 da116db93fe403ba…

MALICIOUS

PDF

74.6 KB Created: 2021-02-26 18:06:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 68cadeaaf874678035055cbf6f3f5d6c SHA-1: 3dab241ed00ea5b9d0a646b993a49e9674fb0c71 SHA-256: da116db93fe403ba67aa1ee16dfc7850022af4fc486eb1ec360669e3c5bbd24d
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 URIs, many pointing to disposable hosting, suggesting a link farm or redirection infrastructure. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate the document's primary function is to redirect the user to potentially harmful external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/award?keyword=4th+grade+math+worksheets+measuring+angles PDF link annotation
    • http://lojapidabud.mypressonline.com/wagner_915_power_steamer_instructions.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/powusokelelo.pdfIn PDF document text
    • http://nat-fru.space/woxaximujenel1ajg.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/pilulekixifuroxuzowow.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/iiSk0QS/power_wheels_jurassic_worldtm_dino_racer.pdfIn PDF document text
    • http://chambrehub.xyz/brother_p-touch_label_maker_tape_18mmc27p5.pdfIn PDF document text
    • http://gixofufivexofu.iblogger.org/45552651124.pdfIn PDF document text
    • http://dajexori.mypressonline.com/67754886963.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/62892101616.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/hNhgqgf/hill_climb_racing_app_free_download.pdfIn PDF document text
    • http://gawajix.iblogger.org/jidapewedafagew.pdfIn PDF document text
    • https://cdn.sqhk.co/sexifirume/gu8MNjf/antventor_point_and_click_puzzle_adventure_apk_obb.pdfIn PDF document text
    • http://pokavitapizinuv.iblogger.org/64727670265.pdfIn PDF document text
    • https://cdn.sqhk.co/moxulofilose/gejchf7/ocean_first_merger.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/85413308914ojigt.pdfIn PDF document text
    • http://vidclips.design/51350542363i7pfb.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/pasawe/77439397659.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/gabirediwuru.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/bible_for_macbook_pro.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/vimog.pdfIn PDF document text
    • http://rovujanoro.epizy.com/utorrent_android_slow_speed.pdfIn PDF document text
    • http://jaxuziwemulogel.rf.gd/understanding_orthographic_projection.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_off0000e790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE790 5388 bytes
SHA-256: 2c92997ea89a53daf05b5448bf3747799b6e953776eff36cd72e7c2c5f79b0b3
font_01_sfnt_off0000f9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CB 10184 bytes
SHA-256: 195f7e6a6605b89c5aa3bb80c7f3af82fbba40154dd83f9f3de06245efb81c3d

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