PDF malware analysis — malicious · 9e8d875338f963e6

MALICIOUS

PDF

81.2 KB Created: 2021-03-24 11:12:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 1fdbce8c9131328e2e57ab615b331333 SHA-1: dc93fc6a30ad468f61c49e6ac3f0eb991bd2c2aa SHA-256: 9e8d875338f963e62aa6eb186d06de5c1d3d0e2810db347a7be398c4fd1f2bad

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The sample was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The PDF contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm or SEO spamming operation. The 'SE_CALLBACK_LURE' heuristic suggests a potential phishing or scam pretext, although the document body is heavily obfuscated and lacks clear textual lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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
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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
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://lozipotod.ru/wix?keyword=toon+blast+hack+apk+2018 PDF link annotation
- http://myirn.icu/95983527911qq4pd.pdfIn PDF document text
- http://bcpzonasegur4viabcp.com/78431511830rc4yw.pdfIn PDF document text
- http://russianpatentexpert.com/gonakexunumasumotoxususinkerbl.pdfIn PDF document text
- http://bonus332.site/97575374207a631v.pdfIn PDF document text
- http://top-agent.ru/cocina_criolla_book5auzq.pdfIn PDF document text
- http://obmenkalnr.online/what_jobs_can_i_get_with_a_management_information_systems_degree3c6th.pdfIn PDF document text
- http://flowerport.market/67269525837d6ss2.pdfIn PDF document text
- http://re-prime.ru/zeberanamivoajz65.pdfIn PDF document text
- http://onkoprofi.ru/wenutadijetve8z.pdfIn PDF document text
- http://titanof-filtr.ru/synchrony_bank_cd_rates_iraicdke.pdfIn PDF document text
- http://lnstagram-helps-contact.com/befewuxidumuveh.pdfIn PDF document text
- http://omerkatanalp.com/importance_of_lesson_plan_for_effective_classroom_teachingjmrjj.pdfIn PDF document text
- http://circulshtangcalip.website/50472075304i6ah9.pdfIn PDF document text
- http://dududuw.mypressonline.com/riwupajuguro.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/9544c03f-f392-4b5a-b817-5d817965e775/how_many_types_of_mental_diseases_are_there.pdfIn PDF document text
- http://bitines.myartsonline.com/74661522995.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9b0346b4-3744-4fd7-889e-b4d381a465fb/11591088049.pdfIn PDF document text
- http://jimomurapujivo.onlinewebshop.net/kewuzuna.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bd38c774-98bb-4fa2-b41e-470ca068672a/59549497281.pdfIn PDF document text
- http://wepikupovug.myartsonline.com/posularotibebategi.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ea7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA7B	5600 bytes
SHA-256: `2b4cb6feb908a9143ec5682f27a99d503ea63a13ba364ab934255d0fd5ea4bc7`
`font_01_sfnt_off0000fd84.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD84	10700 bytes
SHA-256: `1000d26a540ad6c6164418980d25989fffa2c91c47a947d532fd5dbca2d63b0e`
`font_02_sfnt_off00012281.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12281	16092 bytes
SHA-256: `9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2`

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