Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db91a6dd0ade024…

MALICIOUS

PDF

95.2 KB Created: 2021-02-20 15:31:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86af2b89bf613f5c5b594ee9af76c4dd SHA-1: d772d795587733d2fe50c5b50cad34b4564293ee SHA-256: 0db91a6dd0ade024ee9d7062d56b9c0fd44fa0c31daed563a5ed1fa368a90337
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating it functions as a link farm or redirector. The presence of ClamAV and ML heuristic firings, along with the numerous unknown-reputation URLs, strongly suggests malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is designed to direct users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=moonbase+alpha+tts+online
    • https://cdn.sqhk.co/daxegajok/Yq9ORrP/football_training_drills.pdf
    • https://gafepidata.weebly.com/uploads/1/3/0/7/130776025/682703.pdf
    • https://cdn.sqhk.co/pigexebobe/hcArtsm/wedding_hair_and_make_up_artist_london.pdf
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/8e8951831fa7.pdf
    • https://cdn.sqhk.co/vekuperik/7oGyhiy/visotusoki.pdf
    • http://leopolds.space/at_t_digital_life_chat_supportr6nop.pdf
    • https://cdn.sqhk.co/tuminageka/dGroLm6/71968137079.pdf
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/8104536.pdf
    • https://cdn-cms.f-static.net/uploads/4483610/normal_5fd3b2c99408b.pdf
    • https://cdn.sqhk.co/lepudijazur/geohiot/zombie_apocalypse_game_mod_apk.pdf
    • http://alteramaks.world/attack_on_titan_colored_manga_downloadizhm6.pdf
    • http://gtomishebs.xyz/how_do_you_reset_a_kenmore_elite_refrigeratoracwp2.pdf
    • https://cdn.sqhk.co/lefuwaregew/hcgj9yi/bounce_ball_app_download.pdf
    • https://static.s123-cdn-static.com/uploads/4497688/normal_5fff195b0b8e3.pdf
    • https://zorikibezoxima.weebly.com/uploads/1/3/1/3/131384208/a0e78f654112b53.pdf
    • https://static.s123-cdn-static.com/uploads/4447433/normal_6002d3025c7bb.pdf
    • https://cdn.sqhk.co/zotipimesaza/Ciagjjh/top_speed_traffic_racer_car_racing_games_3d.pdf
    • https://fukagopesuzidad.weebly.com/uploads/1/3/1/3/131381553/lefev.pdf
    • https://cdn-cms.f-static.net/uploads/4388177/normal_602185b2c5df5.pdf
    • https://dubonizu.weebly.com/uploads/1/3/1/6/131606556/zorefoxolojawa.pdf
    • http://hot-money.fun/girl_jamaica_kincaid_storybrzps.pdf
    • https://cdn.sqhk.co/fagaxirupunu/vBWhcxO/aesthetic_background_laptop.pdf
    • https://cdn.sqhk.co/defisepeniba/iigd6hf/75958984996.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a66.bin
ec04ee44c7c24f4a901cd36e66b2e830ac7ccd768743c19576cb621bde8c0485		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A66 4744 bytes
font_01_sfnt_off00013a76.bin
428cfa57a5847549dd223619526cff1fdae14f47c7fb7d512408f0b63e26e947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A76 11252 bytes
font_02_sfnt_off000160da.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160DA 4324 bytes

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