Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56858f4dc269d5b…

MALICIOUS

PDF

83.9 KB Created: 2021-03-14 00:34:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 82b414e1c3126c72869a13da700b6015 SHA-1: b29e4f073093b6137b19e05e02dd53b5d6d30361 SHA-256: c56858f4dc269d5b6fbd6948f8557a8608361af8daafc53cc2ed9a2315643405
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and link farming. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/award?keyword=brat+diet+for+adults+pdf PDF link annotation
    • http://alania365.ru/circumflex_on_androidb3z00.pdfIn PDF document text
    • http://radulukolataleb.iblogger.org/96581680686.pdfIn PDF document text
    • http://bigpleasure.ru/american_politics_today_5th_editionmn8f8.pdfIn PDF document text
    • http://itfamily.pro/frigidaire_-_retro_3.2_cu._ft._mini_fridge_-_blackca14z.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/cihieHz/sims_bustin_out_cheats_ps2_max_all_skills.pdfIn PDF document text
    • http://xejeboge.22web.org/71627485249.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/bibKYjh/fewexuzavexogivakoz.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/lXZ2Mha/pigupuxolavozudizetox.pdfIn PDF document text
    • http://trokot-roznica.xyz/piano_music_maker_download0x0nl.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/musoxifuvitalo/zegajulezagoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d631e34f-e390-458c-b990-6797804bba9e/wanabunakefofumikiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9d1c5c7-14fa-4253-9a0f-af85c6810b40/nozibidevizedagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ddfb39-9ea6-47a8-9e55-a3489dbe7ff0/jopenexejurofosepirunova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c562f13e-edd6-4f6e-8f8a-c1dd99411c65/contrato_de_arrendamiento_vivienda_urbana_forma_minerva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/615e7995-afc8-40e5-a5ec-c3a8ae2bd148/irobot_roomba_770_not_charging.pdfIn PDF document text
    • http://gifesikubelazu.epizy.com/gogiluxuporiwe.pdfIn PDF document text
    • http://zonatenitisa.rf.gd/dhakad_chhora_full_hd_movie_free.pdfIn PDF document text
    • http://wasisobe.rf.gd/jofujitepidijosinobovasap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ef64190-5282-493f-9552-f627ca2e4410/84342454915.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/how_to_figure_out_atoms_in_a_compound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c4eef51-8aae-4abf-b48b-174cad48767c/mcculloch_3200_chainsaw_oil_tank.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_off0000f74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74F 5084 bytes
SHA-256: 1cebb902e4ba57acb0a91c9455e64a39f4d619adde600c9f7f11a14e8486e763
font_01_sfnt_off000108ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AB 10636 bytes
SHA-256: 191734dd484421bf172ab5666c881cbd34b3cbcff31278e9498c5ab7d19723b6
font_02_sfnt_off00012d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D46 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953