Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0793a1c01296b1…

MALICIOUS

PDF

79.4 KB Created: 2021-03-02 20:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: abae87f924ad52bec6b382af3dce5aec SHA-1: 5c6763488e6b8f25295265cbefcab1ded457be51 SHA-256: 8a0793a1c01296b1eb69623cfa5756090f9bca72a0b4098cd52ee3ed6f241e4d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=spectrum+remote+guide+not+working PDF link annotation
    • http://kelimap.mywebcommunity.org/69928972919.pdfIn PDF document text
    • https://cdn.sqhk.co/kevekelobivo/UghXWia/10978418918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484624/normal_600f986c52a4b.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/fitbit_flex_2_price_australia.pdfIn PDF document text
    • http://kmplitka.shop/jovebabexufenel4jgur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452389/normal_5fe0191fcf03c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409403/normal_5fe0ecbc86d39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476925/normal_600ff852e9f10.pdfIn PDF document text
    • https://cdn.sqhk.co/sixerusesebu/iegd0yQ/79685194126.pdfIn PDF document text
    • http://chebsvet.ru/kegilijedavoeih27.pdfIn PDF document text
    • https://cdn.sqhk.co/nikapeke/bP2OSDx/tiriwowire.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/dMjbido/emergency_virtual_doctor_game_of_hospital.pdfIn PDF document text
    • http://herss.space/cambridge_audio_dacmagic_100_androidq4lp0.pdfIn PDF document text
    • http://naturfresh.fun/how_to_draw_boy_for_beginners81ubp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kusotuwomaru.epizy.com/reassess_your_chess_chessable.pdfIn PDF document text
    • http://divamepirinati.rf.gd/3020176557.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/map_of_the_world_with_country_names_and_capitals.pdfIn PDF document text
    • http://vesebebiwimana.epizy.com/diwetegazegomorifo.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/little_red_riding_hood_summary_story.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/how_to_clean_a_edenpure_heater.pdfIn PDF document text
    • http://garuwefusu.epizy.com/gaggia_titanium_manual.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_off0000fb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB18 5232 bytes
SHA-256: 8d3a42512a7804bbaa2f3eef07b04a94967d883c850bda54c3ef870cd31dd96d
font_01_sfnt_off00010cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEC 10184 bytes
SHA-256: 36d11c4611213198c4f1a0df3b7f8beae3a89a0436c97c671c58382d48e1856f

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