PDF malware analysis — malicious · 7c5931f47b81540f

MALICIOUS

PDF

373.2 KB Created: 2021-05-25 03:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: 1e38624e19978dc68c55dc21e04cc2e3 SHA-1: 54b45415850b62fb4705910418332c46edcee877 SHA-256: 7c5931f47b81540fca16336ccfed0ebfb4370bfabeeb9b5036aca2dedbf88bab

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious intent, including a remote support lure and a callback phishing lure, suggesting a scam. The presence of an external URI pointing to a suspicious domain, combined with a high ML classifier score and ClamAV detection, strongly indicates a malicious document. Although no scripts were explicitly extracted, the document's structure and embedded URLs suggest it is designed to trick users into downloading further malicious content, likely through a link disguised as a software download or support tool.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 7

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Remote-support tool lure high SE_REMOTE_SUPPORT_LURE

Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
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) documents that carry no urgency or charge/dispute escalation.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://soxebez.ru/strik?utm_term=autocad+2007+online+gratis+en+ingles PDF link annotation
- https://rabuwamefikulo.weebly.com/uploads/1/3/1/3/131398373/badilevuzekopi.pdfIn PDF document text
- https://zunepijubu.weebly.com/uploads/1/3/3/9/133986973/4635910.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4404738/normal_5ff79499c39bb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4479235/normal_5fdcb87922963.pdfIn PDF document text
- https://renenanap.weebly.com/uploads/1/3/4/6/134666424/nosavijabodigiw_xaxat_nujozi_karilabipaduzus.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4401989/normal_603602cc2e319.pdfIn PDF document text
- https://wexarasi.weebly.com/uploads/1/3/4/3/134351888/ruvenofobo_rozadakuzoge_komofeno.pdfIn PDF document text
- https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/404290.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387562/normal_6026da0e3fc80.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/padanivozeb/prentice_hall_mathematics_california_algebra_1_answer_key.pdfIn PDF document text
- https://s3.amazonaws.com/remuv/old_version_of_vidmate_for_android.pdfIn PDF document text
- https://s3.amazonaws.com/wujixus/how_long_does_it_take_for_a_wart_to_go_away_using_salicylic_acid.pdfIn PDF document text
- https://s3.amazonaws.com/purawuma/printable_periodic_table_2017.pdfIn PDF document text
- https://s3.amazonaws.com/mokixetat/lefigiwufizuguwatesobaj.pdfIn PDF document text
- https://s3.amazonaws.com/tobaziw/how_to_empty_ativa_shredder.pdfIn PDF document text
- https://s3.amazonaws.com/petikamov/nemomojuxotejajokutu.pdfIn PDF document text
- https://s3.amazonaws.com/gogoxowiniza/why_does_my_smoke_alarm_go_off_randomly_at_night.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_off000574e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x574E3	5452 bytes
SHA-256: `1a06e9c931e863d02905fa93aca1304a021d2bda7a483721e8983f2c25fa44f1`
`font_01_sfnt_off0005877f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5877F	12424 bytes
SHA-256: `8d64b1d1266255cc93b7e6468af068458867acda18720be9493969c077baec27`
`font_02_sfnt_off0005b075.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B075	16204 bytes
SHA-256: `c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449`

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