PDF malware analysis — malicious · 6472330c1ed8682b

MALICIOUS

PDF

80.3 KB Created: 2021-04-01 14:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 140a59e97ae73ce624a8deed763c60dd SHA-1: 9f4303c153c49457f24d6cbb300a99f97c284fb5 SHA-256: 6472330c1ed8682bd12a4ba1917f02b4276239b7d99e47615ee0349e64eab916

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to seemingly unrelated PDF documents, indicating a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9950

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 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.
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/123?utm_term=durable+power+of+attorney+form+north+carolina PDF link annotation
- http://matemepujibad.scienceontheweb.net/bhaktamar_path.pdfIn PDF document text
- https://vifewilepame.weebly.com/uploads/1/3/4/0/134012930/nurujanepadumuwi.pdfIn PDF document text
- http://kepuxom.mypressonline.com/89131455351.pdfIn PDF document text
- http://getubij.66ghz.com/92532690225.pdfIn PDF document text
- http://jewogipuwivi.medianewsonline.com/kideguger.pdfIn PDF document text
- http://tepifugamokeg.medianewsonline.com/alinco_dj-500_programming.pdfIn PDF document text
- https://pavonaxasove.weebly.com/uploads/1/3/5/3/135310158/61a2b.pdfIn PDF document text
- http://jukojadijomefar.medianewsonline.com/evangeline_poem_excerpt.pdfIn PDF document text
- http://liporolo.iblogger.org/observational_learning_albert_bandura.pdfIn PDF document text
- https://lobusuzagoti.weebly.com/uploads/1/3/4/4/134470260/46cfa2737267db.pdfIn PDF document text
- https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/sedefokiguveg_tudasa_dorasesanujim.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://s3.amazonaws.com/sefiwegegagu/julien_macdonald_dress_size_guide.pdfIn PDF document text
- https://c96d0889-97fb-4213-90a4-a08ae01970e6.filesusr.com/ugd/ed32f2_e037da5dafb345838d16011bf1423c01.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/libowebujakux/cisco_switch_configuration_commands_step_by_step.pdfIn PDF document text
- https://2cfcb734-ec62-4cd9-b61c-03d4762ad765.filesusr.com/ugd/a891c0_2d9a3317e94149f795a2b390a35cc502.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/dukajevo/mefebirevupekij.pdfIn PDF document text
- https://s3.amazonaws.com/zarelusipofox/lalomaxuzemugitewezijodis.pdfIn PDF document text
- http://lolowavedipugis.rf.gd/4686068773.pdfIn PDF document text
- http://muxajetolalet.epizy.com/8057158442.pdfIn PDF document text
- https://s3.amazonaws.com/xozeb/25527958752.pdfIn PDF document text
- https://dca540c6-954d-4243-9f09-0921753db957.filesusr.com/ugd/974a4e_be77e1410c9a40a881bd5a2c10eb4ff7.pdf?index=trueIn PDF document text
- http://tubupokus.rf.gd/wainwright_rcmp_report.pdfIn PDF document text
- https://s3.amazonaws.com/jefobexapulow/french_present_tense_exercises.pdfIn PDF document text
- https://s3.amazonaws.com/fonibinaraj/15288211613.pdfIn PDF document text
- https://s3.amazonaws.com/gapuruxumeg/the_magic_school_bus_live_action_cast.pdfIn PDF document text
- https://s3.amazonaws.com/ruzumeb/42730970561.pdfIn PDF document text
- https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_7e54f1ad2402489ab96781c560d2743f.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_off0000ef75.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF75	5292 bytes
SHA-256: `97b819340d83a74544713b797c2b11a5baa14e17f56e55656f7d34f1b47b2b10`
`font_01_sfnt_off0001015b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1015B	10520 bytes
SHA-256: `21196778f86dc4ab390c2ec7b37b571003b4a7eb1bd08874aebd34db594c0766`
`font_02_sfnt_off0001255b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1255B	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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