Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e56b8aa3b1e2d5…

MALICIOUS

PDF

105.2 KB Created: 2021-03-22 00:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4e9cbfa803be0bfa68a9e1c2a9e2889b SHA-1: 92e39c033a26402075c046daf7296abccd0b5736 SHA-256: a0e56b8aa3b1e2d52a7b700c25430cb434e74855125f0c35af7aaf3ac074cda7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=how+to+setup+bluetooth+speaker+with+alexa PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455377/normal_5fd04135c8ee5.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/eDuhgha/88247520551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451212/normal_5fd6980fc66a8.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/egejfjb/list_of_2015_pop_music_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/OJjitge/sushant_singh_rajput_sad_songs_mp3_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371247/normal_60070f3ce3c2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_602d791cc0e95.pdfIn PDF document text
    • https://cdn.sqhk.co/giwibilawa/aZiaEl8/keropom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mitudosukekunif.epizy.com/histria_do_brasil_nao_lilia_moritz_schwarcz.pdfIn PDF document text
    • http://xorabaza.rf.gd/live_football_apps.pdfIn PDF document text
    • http://jipawivenuzinu.rf.gd/air_force_1_white_and_black_gum_sole.pdfIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_d62cec15e49e4162b85757505078384a.pdf?index=trueIn PDF document text
    • http://lenidifumejuvig.rf.gd/arkham_origins_patch_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/coraline_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/baxezegekomeroj.pdfIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_3f510daec038474bbe8320c1ae77ddee.pdf?index=trueIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_01bd274944f945a5918105674fa011a9.pdf?index=trueIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_f45d016d0b8b4204b67cc08d374ec670.pdf?index=trueIn PDF document text
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_5e59eecfb6df484a920dd7693ee664de.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F69 5232 bytes
SHA-256: a1d8f74428f3ccd26526ae9f11f3ded5d23839356356a1f00f78d5595e24eede
font_01_sfnt_off0001512f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1512F 1700 bytes
SHA-256: 113a67c841af57ed574cc30f094b4ef4e38ec5e5c1b7e8fe725d20ab3659442d
font_02_sfnt_off000159ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159AD 11984 bytes
SHA-256: 374ca5bb0a12e182d43b826f5562ffd4c54f7d2fd3382ecea5bad9512902428d
font_03_sfnt_off00018185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18185 16148 bytes
SHA-256: 333c6b7950143ef5b768b9d621755905cb9f9f437be433e332b6baa8edb2b5fd

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