PDF malware analysis — malicious · c63c2b44302828a7

MALICIOUS

PDF

75.8 KB Created: 2021-05-21 17:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: a7dcbbe811b031c49a8cbafb8596323b SHA-1: 13c70a64d106cd0ad635aa2b3e513999c39678e8 SHA-256: c63c2b44302828a77fee8a83284b179f958eba5969fbf6d369c9bf6559eb0949

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The document contains a large number of embedded links, many pointing to external PDF files, suggesting a link farm or a phishing lure. Although no scripts were explicitly extracted, the presence of numerous malicious links indicates an attempt to redirect the user to harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://crophysi.ru/strik?utm_term=identify+linear+quadratic+and+exponential+functions+from+graphs+worksheet In PDF document text
- https://jagotizepevex.weebly.com/uploads/1/3/4/4/134464701/lurerawux.pdfIn PDF document text
- https://nenubijul.weebly.com/uploads/1/3/5/3/135393623/topodotat_pufeb_kevadod_pupawalojanu.pdfIn PDF document text
- https://fewabobur.weebly.com/uploads/1/3/4/7/134713859/5d54835.pdfIn PDF document text
- https://laxuwipulave.weebly.com/uploads/1/3/5/9/135956831/tikex_sukitepis_xaluliborig_zibarobatedon.pdfIn PDF document text
- https://wobapuzufisuro.weebly.com/uploads/1/3/4/0/134042344/bazagira-zigewebalub.pdfIn PDF document text
- https://vesedosaripiwuj.weebly.com/uploads/1/3/1/6/131636692/8fb816d.pdfIn PDF document text
- https://rawogozanukej.weebly.com/uploads/1/3/4/6/134623914/f517e01b65fb3.pdfIn PDF document text
- https://bowixasexagat.weebly.com/uploads/1/3/4/0/134041419/c1e992d313de.pdfIn PDF document text
- https://rufibomorogad.weebly.com/uploads/1/3/4/5/134505720/54a9982533.pdfIn PDF document text
- https://gitosupogule.weebly.com/uploads/1/3/2/7/132741155/jogetolikasunudop.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/gazivemon/fisher__paykel_icon_premo_cpap_machine.pdfIn PDF document text
- https://s3.amazonaws.com/natewared/gazodofezasuzivirik.pdfIn PDF document text
- https://s3.amazonaws.com/jevelel/digadibojopexufob.pdfIn PDF document text
- https://s3.amazonaws.com/vapite/68435661935.pdfIn PDF document text
- https://s3.amazonaws.com/fuzafuzeruwit/80116251325.pdfIn PDF document text
- https://s3.amazonaws.com/paxuvagal/being_there_fieldwork_in_anthropology.pdfIn PDF document text
- https://s3.amazonaws.com/fakuguvil/2005_toyota_tundra_stereo_wiring_diagram.pdfIn PDF document text
- https://s3.amazonaws.com/guwutivupudutu/dvd_ac_dc_river_plate.pdfIn PDF document text
- https://s3.amazonaws.com/teximikamukubo/method_validation_protocol_template.pdfIn PDF document text
- https://s3.amazonaws.com/taturi/64699094507.pdfIn PDF document text
- https://s3.amazonaws.com/desekusoxi/flight_of_the_bumblebee_piano.pdfIn PDF document text
- https://s3.amazonaws.com/lolijexejomak/gopirololatapefus.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_off0000dbdf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBDF	5840 bytes
SHA-256: `550f8391f3a7fd3a21fd42b5d5d77351b3201eb3676d5c3c380d255d76219c4d`
`font_01_sfnt_off0000efa0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFA0	10408 bytes
SHA-256: `c3c28f3fd0a4db53ea00e845213c0a561cac2ac70e53646bcb135266cbdf3e65`
`font_02_sfnt_off0001130d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1130D	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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