Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7af48d93322f1fe…

MALICIOUS

PDF

76.2 KB Created: 2021-03-29 20:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8fa32c307a8f78addbd41991d632b37b SHA-1: 212e0f2f4de48904a8a6c3ce9c492651df38b849 SHA-256: a7af48d93322f1fe4031aec4013988ece29d15b0ed9876c7d1d940faf142f7a9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs, with the primary one being 'https://fokemale.ru/wix?keyword=do+hard+things+online+pdf', suggesting a phishing or malware distribution lure. The document body is heavily obfuscated, but the presence of external links and the high heuristic scores indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wix?keyword=do+hard+things+online+pdf PDF link annotation
    • http://kakolamilasaru.medianewsonline.com/quran_word_by_word_bangla_translation.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/6sIAgG1/assistive_touch_not_working_after_update.pdfIn PDF document text
    • http://vosajizegek.mypressonline.com/algorithms_illuminated_part_1_download.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/zaralixaxuli.pdfIn PDF document text
    • https://cdn.sqhk.co/zifakepavax/Gd2jd6p/sd_card_reader_for_android_smartphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450890/normal_5ffd481d56a9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489061/normal_600df81d35548.pdfIn PDF document text
    • http://jibesikore.iblogger.org/zomigupekutotagubujibokur.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/fqhcLjf/kesor.pdfIn PDF document text
    • http://zitekimuzefovar.iblogger.org/vetivezivi.pdfIn PDF document text
    • https://cdn.sqhk.co/xosuridasago/Mjfhbsg/edge_lighting_not_working_note_10.pdfIn PDF document text
    • https://cdn.sqhk.co/kinubowa/gjhb891/75887210246.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kugukokoner.myartsonline.com/accu-chek_compact_plus_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2892bc-7e0e-4663-a3e8-8bb5496a4137/tree_of_life_bible_project_podcast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7d89ff0-6589-4265-bb06-529abecde77d/92100683822.pdfIn PDF document text
    • http://fewodekikagusag.rf.gd/tous_les_accords_piano_jazz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d486a1a-c143-4374-b077-9340bd490c30/which_chainsaw_brand_is_the_best.pdfIn PDF document text
    • http://mukazofe.rf.gd/documento_nostra_aetate.pdfIn PDF document text
    • http://radiviwix.onlinewebshop.net/framework_for_ethical_decision_making_in_healthcare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d04b6c8-388a-4697-82f2-4fbfbe2993d2/posexiniganonowuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0bbd28-e261-4d16-99d4-2dca61849ab3/universal_remote_work_with_roku_tv.pdfIn PDF document text
    • http://miwewugewu.atwebpages.com/raspberry_pi_4_b_32_or_64_bit.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_off0000eca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA0 5300 bytes
SHA-256: 20fa74a279b4575d041cce48419fb7aafed258709a97fadafce57db26798ab6b
font_01_sfnt_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 10752 bytes
SHA-256: fb104174eb81096d9b4c7c31cd3863f72c9def739cd6af88a23c950e88eee1bd

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