PDF malware analysis — malicious · 5e21ebeecc3a8ae3

MALICIOUS

PDF

76.9 KB Created: 2021-04-23 06:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 047eef1f50ee0e5db22bbb93df31f996 SHA-1: bd2b8962cfbd705db9c6a591de6ee7d43cce72ae SHA-256: 5e21ebeecc3a8ae354e2c7751c66c4ec48cf5e8f171a265a108953b016985247

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. The 'SE_CALLBACK_LURE' heuristic specifically indicates a callback phishing or tech-support scam pattern, consistent with the document's apparent attempt to trick users into calling a fraudulent number related to a 'planned power cut'. The presence of external URIs and the overall structure suggest it's designed to lead users to malicious sites or initiate fraudulent contact.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=is+there+a+planned+power+cut+in+my+area PDF link annotation
- https://cdn.sqhk.co/wubunepan/iOgfKjj/hero_xtreme_160r_bs6_colours.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4488133/normal_5fcb14e391951.pdfIn PDF document text
- http://legendbilisim.com/boy_scout_store_metairiejysqt.pdfIn PDF document text
- http://topcreditmonitoring.info/436366313688cza3.pdfIn PDF document text
- https://cdn.sqhk.co/mupalewefe/bhdjjgg/toilet_randomly_runs_after_replacing_flapper.pdfIn PDF document text
- http://karnaval.host/56365713472iiqd5.pdfIn PDF document text
- https://cdn.sqhk.co/lofesaxudiwo/y7ETvhi/33616653520.pdfIn PDF document text
- http://itravelgr.com/66917036165srqjd.pdfIn PDF document text
- http://connexion-amelii.xyz/dawigobukogabobexasil40gc0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413458/normal_603239cb8e976.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379471/normal_6045111d4e8d1.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
- https://uploads.strikinglycdn.com/files/c8b6c35e-fd4e-413a-8046-c0d21b905212/kapubakike.pdfIn PDF document text
- https://s3.amazonaws.com/kudowo/41309459348.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/43265680-53c2-4260-9679-b7ac2ffaa1e9/logitech_x-540_speakers.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0c3a8a6c-d86a-455a-bdd6-1f7c0b80e06d/how_to_use_google_classroom_for_video_conferencing.pdfIn PDF document text
- https://s3.amazonaws.com/potamotaz/48459867622.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/76c58995-6fc2-44b5-9aa7-69c99567c373/citrix_access_gateway_va.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8d007f8f-3940-497d-a385-64479d10ea3c/ladosulofobavulewa.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e137.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE137	5328 bytes
SHA-256: `ed0dadd42a7b9cacb3ce3ed34b99b4a1f625c326159bb8049d53730d9dd8bade`
`font_01_sfnt_off0000f32d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF32D	10912 bytes
SHA-256: `e81d4d9e519cd8594f44781a1445a848f8e219a2fdc295a30db84a9e7a1900d0`
`font_02_sfnt_off0001187a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1187A	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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