PDF malware analysis — malicious · 9884c8a0fb6fb2e0

MALICIOUS

PDF

82.7 KB Created: 2021-03-21 03:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: b4d8d5cb2a35e5b50b7a840a3c18f21b SHA-1: d0a3ce678877d23e6c8d03426c3b6365c4455fae SHA-256: 9884c8a0fb6fb2e02a58e3c6ffac86c63be748005bea6285e7638c3cdcf56a33

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with one specifically targeting a search query for 'king of camouflage worksheet answers', suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a malicious document.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://xajibur.ru/wix?keyword=king+of+camouflage+worksheet+answers PDF link annotation
- http://negimemexib.iblogger.org/18458745388.pdfIn PDF document text
- http://sipebep.22web.org/how_to_remove_kidde_co2_detector.pdfIn PDF document text
- http://bexomuxag.iblogger.org/pufigabolonipunisuda.pdfIn PDF document text
- https://cdn.sqhk.co/vovomafejuwa/utFibjj/nice_jungle_adventure_2_hack_mod_apk_download.pdfIn PDF document text
- https://cdn.sqhk.co/sovanoniwuva/hRSgjPH/lukazorako.pdfIn PDF document text
- http://italysummer.space/ielts_listening_answer_sheet5bc0l.pdfIn PDF document text
- http://insurancesouk.com/bolenofewumofopaxhxxvi.pdfIn PDF document text
- https://cdn.sqhk.co/lakekomum/ckbJjba/top_up_go_pay_via_mobile_banking_bni.pdfIn PDF document text
- http://pochta-24.cc/usda_healthy_eating_guidelineszyaaq.pdfIn PDF document text
- http://winoraama.fun/where_can_biomes_be_foundr3cet.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://nuwikomoxiso.epizy.com/6546517378.pdfIn PDF document text
- http://kexemejalo.epizy.com/96796482854.pdfIn PDF document text
- http://dogibuboka.rf.gd/rugajapi.pdfIn PDF document text
- https://s3.amazonaws.com/zarelusipofox/9369469109.pdfIn PDF document text
- https://s3.amazonaws.com/ganubatebedoxez/77109346510.pdfIn PDF document text
- http://puxudodasak.rf.gd/agilent_seahorse_xfe96.pdfIn PDF document text
- https://s3.amazonaws.com/tiniruru/tuwavi.pdfIn PDF document text
- https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_e6a894fe4a3b480689503ac4362da4bf.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/ladiwuzetawedi/pneumatic_flow_control_valve.pdfIn PDF document text
- https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_d1d11a4a7e3f4baf8b7733d9808d1ed4.pdf?index=trueIn PDF document text
- http://xavisijividefo.epizy.com/nkjv_bible_free_download_apk.pdfIn PDF document text
- http://dagogedimin.rf.gd/arduino_lcd._h_library_zip.pdfIn PDF document text
- https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_20a04b7bd55b4fcfa95a019efc910a93.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jovekus/8990192154.pdfIn PDF document text
- https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_09f480232e61430eb4965467efb88e0b.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f710.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF710	5304 bytes
SHA-256: `86b0ab8f82a0334425d175745fd3e9a791bccd48f3b68ab6a3e9e2f29b955b9e`
`font_01_sfnt_off000108fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108FB	10564 bytes
SHA-256: `1aa6ea6195302ec1a6307bc22356863d366e28909b52dda9c22fdbae16d3b53a`
`font_02_sfnt_off00012cde.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12CDE	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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