Malicious PDF — malware analysis report

Static analysis result for SHA-256 348063ab28467559…

MALICIOUS

PDF

83.6 KB Created: 2021-03-08 12:13:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0b1f15a1eccc90a22933d8e64d33e36 SHA-1: ebdd8983172a8086ced31cd6aa2ce7774e1555e2 SHA-256: 348063ab28467559874dad1873b523bcd3cfa1c379a8eee58b27c7d15320fa64
156 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating a large number of external links, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to 'Ip due diligence report example', likely a lure. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the intent is to redirect users to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/123?utm_term=ip+due+diligence+report+example
    • http://topcreditmonitoring.info/remember_the_titans_video_worksheet_answersmskqh.pdf
    • http://tagaporigowekis.mygamesonline.org/world_map_with_country_names_and_capitals.pdf
    • http://mizizufiku.mywebcommunity.org/lejelizumurulevomitasu.pdf
    • http://pubgmobiie.com/29823540765m5ocx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_740bee6ef89049cd93cfef85b6661b94.pdf?index=true
    • https://s3.amazonaws.com/paropabaru/background_music_free_for_birthday.pdf
    • https://s3.amazonaws.com/gawabog/perejo.pdf
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_bb707236a42c456da108705428d64e0f.pdf?index=true
    • https://s3.amazonaws.com/novifamigot/lipid_profile_report_format.pdf
    • https://s3.amazonaws.com/bugutaj/amd_graphics_card_for_pc.pdf
    • https://s3.amazonaws.com/bubodeliza/jifazosewogatisujonuxib.pdf
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_bf099850a00e4dad8f5a0114b3c53066.pdf?index=true
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_08a1d16539064f68be2e1735f53ebfaf.pdf?index=true
    • https://s3.amazonaws.com/lomuper/47633680022.pdf
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_a4c4a6512231419da4e30b4fec3f570b.pdf?index=true
    • https://s3.amazonaws.com/mixanaz/sudujekuzavilibosojekixoz.pdf
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_08a24c707d59402fa903667f3c1f9639.pdf?index=true
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_de6c721f973746958cc7af9d55809956.pdf?index=true
    • https://s3.amazonaws.com/bulikowexunepov/flight_tracking_app_for_android.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_off00010a19.bin
11afb30aa3fd87ed5aba07140e055360ccc784db9735968710e7e362a530c4f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A19 5220 bytes
font_01_sfnt_off00011bd1.bin
a6e2965eab29442e848d4ad4f1ea00547aee0cd6ed13cabe7b64ed80e095da85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD1 10944 bytes

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