Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80df1ab95c6df90…

MALICIOUS

PDF

77.3 KB Created: 2021-03-12 18:06:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 95b607f49164383142babf10e5ce44e1 SHA-1: 59f0824b0f2df00417f36dcda950bc80e7b9627c SHA-256: a80df1ab95c6df90fa6d9b4020a9ba9b091de6991a10448f22df34d0e8c324d0
156 Risk Score

Malware Insights

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

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 0.9998

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 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.
  • 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://botokaw.ru/strik?utm_term=kenmore+series+500+4.3+washer+reviews PDF link annotation
    • https://togolotokafusaf.weebly.com/uploads/1/3/5/2/135294136/1269697.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/hp_photosmart_d110_scan_to_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/767407da-a76e-4683-9ae3-46e0c31429f9/bring_out_game_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/68297420992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd9c023d-8b77-4bcb-abac-6db2fb3e70a4/jvc_vhs_camcorder_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b3ce81-37a6-4839-95cf-1e48f54acc41/nagebofexemuzof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46dee302-c8ec-4be3-a3de-1070fcbeb53b/tipos_de_derechos_fundamentales_en_argentina.pdfIn PDF document text
    • http://kogosez.epizy.com/chemistry_book_free_bangla.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/cad_blocks_3d_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/what_is_the_child_support_percentage_in_michigan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c67a1c79-c557-4b4c-aa8d-b5f2e46bf720/4th_grade_math_word_problems_multi_step.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/gonodavexurinaxafev.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/chirosathi_movie_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed63c51b-9e17-4c7e-a06c-c491e168b21f/rothfuss_book_3_release_date.pdfIn PDF document text
    • http://gonoluripep.rf.gd/how_to_use_slimline_digital_scale.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/wutub.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_off0000ee2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 5564 bytes
SHA-256: decf0cc06c3fc0c5ac9efd61ee0dab6b1cdd94fba30bba92e91b9595cc18e0d7
font_01_sfnt_off0001011a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011A 11404 bytes
SHA-256: 091e64eeceeb4ff358c2051b3a1ee126e7dfaeced8ac45b33a55dd2ae8fd699b