PDF malware analysis — malicious · c890fb804e30fb7d

MALICIOUS

PDF

77.7 KB Created: 2021-04-02 04:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0f3443e74f38997fd9485309b52799f8 SHA-1: 53bcc7f682fc5694cced4c090987a65acee09a0c SHA-256: c890fb804e30fb7dc2cd6176df445d6860fe64e14fe7b741fdc832633b979905

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via the embedded URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9705

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://dafemum.ru/award?keyword=printable+blank+board+games+pdf
- http://teroved.22web.org/who_is_the_voice_of_the_female_mandalorian.pdf
- http://dokovuxumev.22web.org/64898301328.pdf
- http://cheapestshop.xyz/free_speed_test67xzh.pdf
- http://vas-rem.ru/varinawovogoil87p.pdf
- http://magicwoolshop.com/critical_ops_apk_data_latest_versiondp18a.pdf
- http://wuxabikizumir.22web.org/caustic_drain_cleaner_safety_data_sheet.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/79bbbbc7-edcd-4592-96a0-ac901d3d3b4b/57326721963.pdf
- http://lexuwusifo.epizy.com/feruzat.pdf
- http://mebexadesojixip.rf.gd/yasuo_bottom_guide.pdf
- http://rereroma.epizy.com/dodusab.pdf
- https://uploads.strikinglycdn.com/files/ab8f20d7-af1f-4a37-b7bc-54769cc3d739/julidunuligojoj.pdf
- https://uploads.strikinglycdn.com/files/c907cc75-4b96-4642-8ad1-ca1050d74501/womexixotegul.pdf
- https://uploads.strikinglycdn.com/files/68153af4-bf70-4110-a63a-61cb92c203fa/monster_girl_doctor_watch_episode_2.pdf
- https://uploads.strikinglycdn.com/files/105d3e22-4d06-4938-81f9-7271565e0c71/xavikivuxevovopiz.pdf
- https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_abbeae15154c4b238ed5bba01a963d6f.pdf?index=true
- http://xupudajiwozov.epizy.com/apple_report_phishing_website_ahead.pdf
- https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_54e1f9d8975b44c395c27316b26ee204.pdf?index=true
- http://tasobigadegef.epizy.com/synonyms_worksheet_for_grade_2.pdf
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fe22.bin` `9c19be76c1c16f0517a1357622723884fd6cee8a05f45afec87fba134f6f67dd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE22	5564 bytes
`font_01_sfnt_off000110f0.bin` `10ed805d2a68e2a0022377116d77c5e92f9cdae47a0bf13279a6e7225d7e1ba0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x110F0	10968 bytes

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