Malicious PDF — malware analysis report

Static analysis result for SHA-256 150b822cc35b2313…

MALICIOUS

PDF

94.2 KB Created: 2021-03-23 21:13:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 14097e31ab8c58d970efd929885c99e1 SHA-1: be873c2bb43733c82286e167a20637bf34300225 SHA-256: 150b822cc35b23139ffcf85655c2ffe5f5f514b7b9863b1df10ba21811f32c99
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or credential harvesting attempt. The presence of external URIs and the overall structure indicate it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://vilenefex.ru/123?utm_term=p5+ohya+confidant+guide PDF link annotation
    • http://jofipifemu.medianewsonline.com/konica_minolta_bizhub_c454e_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/oX2DBtx/balance_druid_guide_icy_veins.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/madame_butterfly_book.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/35909738314.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/eCmijjh/t-_mobile_customer_service_number_nl.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/dgdPhf3/fashion_runway_all_stars.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/hgiijgd/jodakupifuwu.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/widFQjf/pafuki.pdfIn PDF document text
    • http://mukovasisoro.mygamesonline.org/detarimireloxiwat.pdfIn PDF document text
    • http://samitap.iblogger.org/lalakokenusotogoj.pdfIn PDF document text
    • https://cdn.sqhk.co/dowepigakaw/Z4ihjaV/d_h_equipment_blanco_texas.pdfIn PDF document text
    • http://zamirelerubonex.iblogger.org/faneb.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/zigag.pdfIn PDF document text
    • https://cdn.sqhk.co/fekesolip/kijjhig/ragagevadewopufugaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/174a0051-5c52-42ba-972b-7347c4e8458c/attack_on_titan_season_3_part_2_opening_full_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb50642d-842e-4818-8d68-697138e8c73e/fusuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a59dabfd-a7bd-4dce-875e-337ba66e5d59/93131731170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/226fa7af-c7e2-49a4-849b-194ecf221c0f/nawopu.pdfIn PDF document text
    • http://fufibilola.epizy.com/96391820685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c591ff8-ccc1-40b0-88da-e96dd3187e0e/criminal_defense_attorneys_in_houston_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52267760-cc77-453b-b6d8-5922ca39eb3b/ncert_maths_book_solution_for_class_7_chapter_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5179d4fa-91c2-47fe-9fd3-73b5e3024213/how_deep_is_a_sub_zero_refrigerator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2c2338-dc11-47c9-a5ed-5dfa9010edaa/35200114620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e39e9cd6-50ab-4d36-a592-15ba20b5c7e7/gibezagezikujopagidudi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D59 5204 bytes
SHA-256: c4e9f4505f83174557d660adf935863cc7fc2edcef1bb803dc1393722d2f8ac1
font_01_sfnt_off00012f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F23 10876 bytes
SHA-256: e503b9fe7e6b7373ac25a5cc1879a0148f949dd31260bdd6624ed7c29ca6de99
font_02_sfnt_off000154cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154CF 16348 bytes
SHA-256: c7cfc138ee9fd9369b8b16460bde0d5057fa814c881a6723e1206d4699793506