Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4fd088bffe563cd…

MALICIOUS

PDF

73.5 KB Created: 2021-03-28 11:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e625f6761732eef19d45d7df39512a72 SHA-1: 964cf1684744d694f20dc56ca3f7131032e2187c SHA-256: f4fd088bffe563cd05719fbe397c7ba5bc6df2e18170a8e1b6db0d844f6a84bc
134 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many hosted on disposable domains and forming a link farm, suggests a phishing or malware distribution scheme. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick users into clicking a link to download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/123?utm_term=agricultural+technology+management+agency+pdf PDF link annotation
    • https://cdn.sqhk.co/sulugedako/iihhInR/14210131185.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/jf7jcii/slices_and_ices_rockaway_park.pdfIn PDF document text
    • http://stepka2016.xyz/gitoxikumowozes6g0td.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/gduTuhf/boxhead_zombies_2_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_6014f4bd20736.pdfIn PDF document text
    • http://best-ital.fun/puvigalikukaluniledebenix3ixa.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/gighXTh/gujimokonimix.pdfIn PDF document text
    • http://nakijeku.mygamesonline.org/coffeescript_tutorial.pdfIn PDF document text
    • http://wgathering.org/470563545132yp17.pdfIn PDF document text
    • http://kusafomidufe.mywebcommunity.org/as_time_goes_by_casablanca_piano.pdfIn PDF document text
    • http://buytoday.cc/gowomofekonewotojesoxo0wp9a.pdfIn PDF document text
    • https://cdn.sqhk.co/nepofigiper/yihTxhi/zombie_road_trip_mod_apk_3._30.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/fbd5c8eb-3b58-4ddf-9331-e181fe764a77/troy_bilt_super_tomahawk_2_in_1_chipper_shredder_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4915ba5c-4302-45ad-8b9b-8c0c7d966f17/jepitixekizow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e13dc402-a5c2-4da6-ad7a-421f83692ba7/zafozegiwig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f43abf-b0b1-4447-a9b2-be8bd52c7b44/remalaxepodajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f559b0c9-3b0d-47ff-9806-fa0e6aee39fe/the_lexus_and_the_olive_tree_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07545051-4127-4355-97f1-77a52b6348c0/jobikaferadofedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1993e78b-c37d-4840-9b98-29a637b39e98/60830702796.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_off0000e0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CC 5480 bytes
SHA-256: 4f6ce52bee926e555d9cbb2940557624f576a36f2f7818be523ff2085fb17738
font_01_sfnt_off0000f354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF354 10872 bytes
SHA-256: 38922dce4122191abc8de9d44f5914f0f0565bad63f358f74869c8e951064c36

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