PDF malware analysis — malicious · 251cf4ef7805f955

MALICIOUS

PDF

78.6 KB Created: 2021-03-28 17:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: 1debac97004ab0ec1db77489460d7be6 SHA-1: 4171c2d7a0b6a2de7d6e6e66ad1f0424221393f9 SHA-256: 251cf4ef7805f955805f74205aa97207ad051d6eeac3c58b274bb2e69d32efdc

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security scans. While no scripts were directly extracted, the presence of multiple external URIs and the overall detection profile strongly suggest it's part of a phishing or downloader scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://botokaw.ru/123?utm_term=schlage+keypad+lock+user+guide PDF link annotation
- http://funseeds.site/565284252642eyba.pdfIn PDF document text
- http://scoretdho.best/32182153711u4w4y.pdfIn PDF document text
- http://hotloveme.online/wildgame_innovations_insite_cell_wifi_password1d4dr.pdfIn PDF document text
- http://criticcxck.space/72814744511qe0rh.pdfIn PDF document text
- https://cdn.sqhk.co/zuzipogowita/jCiiKRt/adventure_escape_mysteries_trapmaker_chapter_2.pdfIn PDF document text
- http://souve.me/tarot_card_combinations_reading_onlineaxdy0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387581/normal_603d8717b2228.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378621/normal_6038b40d0f821.pdfIn PDF document text
- https://cdn.sqhk.co/kapipota/ghneGi3/fireboy_and_watergirl_3_forest_temple_unblocked.pdfIn PDF document text
- http://santecmb-sarl.com/lazirosovabedusivob6cqoi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495400/normal_603df37b10fad.pdfIn PDF document text
- http://lnstagramsupportinfo.com/vonifokirujewuziwanxp0i.pdfIn PDF document text
- http://salet.store/36427782444m3q5i.pdfIn PDF document text
- https://cdn.sqhk.co/xijodepub/bPmJYgd/kavujifatonudananul.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367961/normal_605c031d03579.pdfIn PDF document text
- http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
- http://aov.one/how_to_connect_schlage_connect_to_ringilugc.pdfIn PDF document text
- http://fabulouss.space/8_ball_pool_break_cheat5ufal.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388183/normal_5fd3a3d432ad3.pdfIn PDF document text
- http://kismykeitio.best/how_to_open_door_lock_on_beko_washing_machine832a3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465018/normal_60205c6dcfbe2.pdfIn PDF document text
- https://cdn.sqhk.co/zanemulazif/elNEjb1/80806938152.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ea03.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA03	5300 bytes
SHA-256: `1a207163850a613c5c6ccbaa78a5970d03bd09c8d8f1bd8b46a12470b040e2e2`
`font_01_sfnt_off0000fc0f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC0F	10236 bytes
SHA-256: `3e8093e9c878c7f2c4b13bf713b867d89a1eec0b5a928779418d9e0f31ad5895`
`font_02_sfnt_off00011ee7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11EE7	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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