Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ecaa9ab47cb10c…

MALICIOUS

PDF

66.5 KB Created: 2021-03-18 10:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 96ef329965e2e15e0c1efded3ebeee6f SHA-1: 57ca6fd0b0beaccc8655834e0cdeb595f3011edc SHA-256: 35ecaa9ab47cb10c6db39679e0eb06d2664593e3018bd1fc1fd52c67069f29b5
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, with several pointing to disposable domains and potentially acting as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to manipulate search results or redirect users to malicious content. The presence of external URIs further supports this malicious intent.

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://ponafet.ru/wix?keyword=and+i+darken+pdf+vk PDF link annotation
    • http://mitedujonajezed.scienceontheweb.net/47613422261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416664/normal_60504e52eb504.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/delta_unisaw_motor_pulley.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/pathfinder_kingmaker_valerie_romance_ending.pdfIn PDF document text
    • http://julozagoren.22web.org/54666735171.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402297/normal_5fe4708331a53.pdfIn PDF document text
    • http://maxuruz.22web.org/ayyappa_songs_lyrics_in_tamil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489033/normal_5fc61228d78d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_5fd657b8068e4.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/FhbOjc7/fly_away_little_birdie_lyrics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_fe530c1941d24dbf8aef565a1563d440.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf07d12b-7152-4561-b054-10ec9607390e/allen_carr_book_free_download.pdfIn PDF document text
    • http://dodigemadepa.epizy.com/9902295530.pdfIn PDF document text
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_281292c2fd2c4cb6b8a7992cd5990297.pdf?index=trueIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_93e73a685edc4fe19163ab5da46e91cf.pdf?index=trueIn PDF document text
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_424b009798d84141ba9cad272950ed5c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/271a75d6-19c2-4251-ba97-0a2afa6f0d71/86974596981.pdfIn PDF document text
    • http://rorokepu.atwebpages.com/jaketijavamixaniju.pdfIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_7cd4e8d0930c41a4abf17206633cf070.pdf?index=trueIn 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_off0000c968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC968 4936 bytes
SHA-256: 281e15d67c0d91f6f67ae2415e4f3b4466068b46c3e64679b01633299128ef96
font_01_sfnt_off0000da50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA50 10516 bytes
SHA-256: b3e209ce80dcbb66fde8583c31d037c61c107da95d8417a95e7e1904abfe4d89

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