Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad50839e7969a098…

MALICIOUS

PDF

68.4 KB Created: 2021-03-21 08:04:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 43ff2f7e42f3649ad53b7b0c58ecbac4 SHA-1: b541f8e93d580d85e085b8d1d9262ffec864d38a SHA-256: ad50839e7969a098d5197c1385d2c6954727694b86d2dd2d48200f4c6ead6af4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable hosting and potentially malicious domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains fragments related to 'shayari videos' and 'sheet music', likely serving as a lure to disguise the malicious links.

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 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://midufefew.ru/123?utm_term=very+sad+shayari+video PDF link annotation
    • http://islandlandscapesbb.com/jurassic_park_theme_sheet_music_pianohmr3x.pdfIn PDF document text
    • http://beremoter.online/35333838952cce9l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455670/normal_6008a3b83e779.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/hwdxigB/69267654983.pdfIn PDF document text
    • https://cdn.sqhk.co/demawanetufi/vIiecYi/nabejibe.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/UzgGOjg/kofasujuli.pdfIn PDF document text
    • http://tesocoin.online/tomma_graves_frankfort_kyzl3oe.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/bgdjhgh/77679598760.pdfIn PDF document text
    • http://mgacessoria.online/71690622634lcecl.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/gjfhghc/39877730965.pdfIn PDF document text
    • http://eslife.pro/ca_association_of_realtors_commercial_lease_agreementxwmtm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385012/normal_6037febdee81f.pdfIn PDF document text
    • http://cheeronthemove.store/46251541108rf3k1.pdfIn PDF document text
    • http://epipog.com/sofezabiruxubzmrvw.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabudoxuwa/iggjJjR/study_guide_for_coding.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/efe68681-a8f2-41e5-b69c-08d0dc9d8a07/dasivebida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3142a69-afac-4cbb-ba91-48fe0511e0f1/47978260624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ed78bd6-1a4a-4819-82d8-0c277ca7058d/22293989624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5328ec95-994a-4d39-857f-1d7b243b8b6a/sagif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da626ee2-8cfb-448f-ad46-1632ab664435/how_to_black_and_decker_rice_cooker.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_off0000d149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD149 5008 bytes
SHA-256: a81d5b8792932b589ae843f49341696201df31edb988b520c04023f87b90c6ef
font_01_sfnt_off0000e258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE258 10208 bytes
SHA-256: 9a9f639b3d2c29430d557f1f0a09f9e61fdaca8ac3f30ce3a7070097dd63183b

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