Malicious PDF — malware analysis report

Static analysis result for SHA-256 740e12643f6652c3…

MALICIOUS

PDF

73.6 KB Created: 2021-03-12 09:24:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 647375324468429ac40b1a8b1d159c79 SHA-1: e6c72127110d27ef6f927782398677e8fb55f8a4 SHA-256: 740e12643f6652c30adc4241c4350dcf16807633743ed0cb7137c50c827891c8
134 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm, with numerous external URIs pointing to disposable hosting, and includes a deceptive 'download button' lure. The primary URL, https://lozipotod.ru/123?utm_term=2020+calendar+vector+free, is likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=2020+calendar+vector+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465264/normal_603401390ee37.pdfIn PDF document text
    • http://kellys.space/easy_way_to_draw_a_baby_girlvamu7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418981/normal_5ff0f25ab5ba8.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/ii09haF/12904207274.pdfIn PDF document text
    • http://apelsins.space/63608459938na1va.pdfIn PDF document text
    • http://everydayy.fun/xojarezefeteviiwzyj.pdfIn PDF document text
    • http://b0xberry.online/xiwufut4pok.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/jhhiiXy/photon_strike_bullet_hell_sci-_fi_shooters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424692/normal_603154e271a42.pdfIn PDF document text
    • http://kleomaften.online/vray_proxy_trees26vir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412900/normal_6015a9805dd71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puwepubofixa.epizy.com/audacity_free_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/986e5eb6-51c3-4e57-af9e-b69c9f8949ea/harbor_breeze_santa_ana_ceiling_fan_recall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7723e8-644c-4c4e-a8e8-46e06ed9997c/how_to_harvest_loose_leaf_lettuce_so_it_keeps_growing.pdfIn PDF document text
    • http://megisaduvivegi.epizy.com/insure_oklahoma_income_guidelines_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a077c2-576b-4a72-84fd-eb6493aea086/kelley_blue_book_value_of_my_used_car_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e45448c-fbc5-477f-8bbb-f11f3d05fba1/24393740986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6a85a30-1563-4551-a0cd-565c0556b0fb/margin_of_safety_book_seth_klarman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a1f847f-31a1-4722-aeae-cafb6a317cac/king_kutter_finish_mower_blade_removal.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_off0000e3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B1 5076 bytes
SHA-256: 527ac6dd9b01812b85e861b5f54b3d5584d573771ef1a73ede3736a688c7e69d
font_01_sfnt_off0000f508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF508 10664 bytes
SHA-256: f7e4677bf719641d6b147ef9fa94c718198815ac8b9f16a6d2c398b4eae01033

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