Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2063e4ca81742a…

MALICIOUS

PDF

74.1 KB Created: 2021-01-31 18:57:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 171bddb997407814e6b1ad648c44a85b SHA-1: eb6f0ea56efcb9ceaa03697f70e49103d44907cd SHA-256: 2e2063e4ca81742a68b4bbb09381566286b9422753deb59346ab9661a6d5a069
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'math worksheet answers'. The presence of external URIs and the link farm heuristic indicate an attempt to redirect the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/123?utm_term=some+friendly+advice+math+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/midipijikami/hhe90GJ/tanuduwokolezupadigi.pdfIn PDF document text
    • http://ver-alex.website/70862178752xkz8c.pdfIn PDF document text
    • http://leqqurint.online/416606485752p6bc.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/mxHihhh/18345432398.pdfIn PDF document text
    • http://copyright-central-media.com/rinigaferezuwilfdxh.pdfIn PDF document text
    • http://nonretloli.site/jazedenazolidalisikewagearezd.pdfIn PDF document text
    • http://zoosalon.org/lixusagiseyrb2m.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/srs_light_honda_crv_1999hvrj8.pdfIn PDF document text
    • http://trokot-shtorki.online/spelling_practice_games_2nd_grade75u86.pdfIn PDF document text
    • http://pet-guru.shop/23250582207u1ow6.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/ihPzicN/62911678795.pdfIn PDF document text
    • https://cdn.sqhk.co/vifutetax/X1jha1B/xososaneradupifovigeku.pdfIn PDF document text
    • http://becloud.website/78587777081bcxpn.pdfIn PDF document text
    • http://legalvictory.group/244006836783mcsm.pdfIn PDF document text
    • http://numberoone.xyz/3540742267ejda2.pdfIn PDF document text
    • http://podarokinsta24.online/the_light_phone_2_reviewvl61t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/gimukagogemejug.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/msi_afterburner_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/lebuxobiguduguduviv.pdfIn PDF document text
    • http://sabenimuzu.rf.gd/software_wondershare_mobilego_for_pc.pdfIn PDF document text
    • http://pivunovukemo.epizy.com/how_to_make_worksheet_read_only.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/new_malayalam_movie_charlie_ringtones.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE256 5680 bytes
SHA-256: 5f6c1fbca3f26da96adb968baf3eb3696309db0c16eb960376562e0f4a63861c
font_01_sfnt_off0000f59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 10984 bytes
SHA-256: 845f68b200341be2f374f55c5c1f6d7362d5e4dee609ca86e7118a576b59e78f

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