Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7de97a324dcadb…

MALICIOUS

PDF

98.7 KB Created: 2021-03-13 21:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 91a563640954c2cab44d4821513f0a26 SHA-1: d4b2db048f5c11bec2583f28783a88c757a6f07c SHA-256: 4a7de97a324dcadb2ce7925332ae2fee1eacdd81fa0f150ad54a02fec0ee924c
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. Heuristics indicate the PDF is a link farm hosted on disposable infrastructure, and ClamAV detected it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to malicious content.

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://soxebez.ru/award?keyword=ccht+practice+exam+2020+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393361/normal_6020c9c726d63.pdfIn PDF document text
    • http://salonly.xyz/what_is_english_lawm67td.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485014/normal_603a113e1160e.pdfIn PDF document text
    • http://kowojogu.iblogger.org/japanese_phrasebook_and_dictionary.pdfIn PDF document text
    • http://rubeatyshop.xyz/divergent_full_movie_download_in_hindi_720p_worldfree4uyqd5l.pdfIn PDF document text
    • http://goodnaturak.space/airpods_2_features_on_android9mm4h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414358/normal_6006aa364f555.pdfIn PDF document text
    • http://uscreditcheck.info/fererisyuaer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_0ce128e3db004ca7b5fefce80de51dac.pdf?index=trueIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_92d6a1e33540408fb00f2bb63da88ede.pdf?index=trueIn PDF document text
    • http://fulovefodib.epizy.com/81606686112.pdfIn PDF document text
    • http://zuwodiruvukima.epizy.com/pemikiran_marxisme.pdfIn PDF document text
    • http://nelodetasa.rf.gd/28166258479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c6ecdae-bf2b-4564-a870-ce33faecb199/our_mathematical_universe_by_max_tegmark.pdfIn PDF document text
    • http://lagamifex.epizy.com/jizus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da107451-4a4f-4896-884b-2431ba2588b9/a_red_and_pleasant_land_trove.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/transfer_iphone_contacts_to_android_icloud.pdfIn PDF document text
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_c860628d8f97433abc52291ef54568b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/195c9b65-5c60-474e-b8ff-f0f748d9f6cc/new_mercruiser_5.0_engine_for_sale.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10840 5596 bytes
SHA-256: 9ab49b4b3aa035235d8ce42d6df23f2f3034006aa3f030b1510724a3164db1ac
font_01_sfnt_off00011bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFB 5432 bytes
SHA-256: bb775bc5f886051d556c876473f2d10dd9ec1ca1404b4b3c4f7fa965283d0172
font_02_sfnt_off00012e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4F 19068 bytes
SHA-256: bc0fd4abc66ce0c24c2472b0aff445af1fa87a374e76be79ca1eedeee367eea0
font_03_sfnt_off0001647a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1647A 17172 bytes
SHA-256: 65bd128e0953b3efb5390ca23cbfc41bc81517753f371d675cd7824782919d5b

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