Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1feceb6342772e9…

MALICIOUS

PDF

148.1 KB Created: 2021-03-24 00:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8660f05b020c3cd9a1223dcbc8f34f80 SHA-1: 4ed2ace596172dd3efe6a3cec9dd71f046d2cd39 SHA-256: b1feceb6342772e942ece6d1370044f5a3aea996a7a6211ebd7d43fd56ce70c7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojanized PDF. It contains an embedded URI pointing to 'maypoin.ru', which is likely a malicious domain used to host a phishing page or distribute further malware. The PDF structure and embedded content suggest an attempt to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://maypoin.ru/123?utm_term=bushnell+ambient+weather+station+manual PDF link annotation
    • https://kenomuxi.weebly.com/uploads/1/3/4/0/134042647/xijiparawifepes.pdfIn PDF document text
    • https://nalodewemutut.weebly.com/uploads/1/3/1/1/131164475/kapidumewus_godazonega.pdfIn PDF document text
    • http://mjawebdesign.net/panasonic_cordless_phone_manual_kx-tga470sd0gw.pdfIn PDF document text
    • http://memaberenux.scienceontheweb.net/51328464282.pdfIn PDF document text
    • http://reduslim-ufficiale.website/9677337881611tf0.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/how_to_change_my_dometic_thermostat_to_fahrenheit.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/what_is_the_electron_pair_geometry_of_so3.pdfIn PDF document text
    • https://vonorakukipi.weebly.com/uploads/1/3/4/7/134721252/sutosuwurudu.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/yasin_suresi_meali.pdfIn PDF document text
    • https://nagejezesalu.weebly.com/uploads/1/3/0/8/130874580/zitomulinirodox.pdfIn PDF document text
    • http://negimemexib.iblogger.org/gufudagadidimaxufewi.pdfIn PDF document text
    • http://smartcreditus.info/how_to_replace_ipod_nano_7th_gen_screenybnlq.pdfIn PDF document text
    • http://gimatadokij.mygamesonline.org/ibps_rrb_notification_2020_salary.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/6c6e10fd-5250-46e0-9aaa-1dc1d7a6657c/how_do_you_start_to_crochet_a_granny_square.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7705a3cd-6099-4f97-a3f0-cbe06900af3f/gurubesazav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28038abe-439e-4867-ad47-ba81f691fd25/hunter_30_sailboat_owners_manual.pdfIn PDF document text
    • http://gexegufikide.epizy.com/75439487337.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/1997_polaris_xplorer_400_carb_settings.pdfIn PDF document text
    • http://fididebezewigex.epizy.com/fivepulis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3342e894-3dc4-4f3b-87fb-3383c190351e/91505599218.pdfIn PDF document text
    • http://fijorolur.myartsonline.com/public_speaking_coaching_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/101d698d-40af-41dd-84c5-fdb2da58682f/5036335875.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_off0002066d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2066D 5208 bytes
SHA-256: 0bd21291747f1e2b689b279f8fd4f0b57bf229b99923d11e2bf36b168de2843a
font_01_sfnt_off00021803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21803 12328 bytes
SHA-256: b17a3a9662d5199e8d871e5a0761d400b5f48e84104608a51cabac0ff2bcae27

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