PDF malware analysis — malicious · 994974ea286b7a9b

MALICIOUS

PDF

81.7 KB Created: 2021-01-07 23:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 1e9e73ec7ababcdd5f3c205e4f90070f SHA-1: ba7b10320fd6827307bb100c64c2cd91266cd176 SHA-256: 994974ea286b7a9b8ef44b2e4b8a98e5fe81066cba5a5fb88be5b00c4e0f5471

222 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'traffking.ru'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of outbound links, many of which are likely part of a SEO spam campaign. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic suggests a lure to trick users into clicking on these malicious links, which is further supported by the ML classifier's high confidence score and ClamAV detection.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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
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://traffking.ru/123?utm_term=clash+royale+hile+apk+android+oyun+club In PDF document text
- https://degujipimisa.weebly.com/uploads/1/3/1/4/131453395/6084972.pdfIn PDF document text
- https://cdn.sqhk.co/sirazisiluz/REs0ADa/dominos_delivery_jobs_london.pdfIn PDF document text
- https://cdn.sqhk.co/moviferu/Sif2gjJ/koxaduvabuwuvamaferud.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/c4cd9ba4-3472-49d3-8e52-2771bb2cdd96/siwipugetimo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/008fe259-7018-4c19-b0a1-2160e5a16367/xuguzume.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1270ba16-c4a9-4ff3-a168-99bebde214a9/jevizigoxemivuluf.pdfIn PDF document text
- https://s3.amazonaws.com/peveziwoguxuzam/brevet_pro_2019_maths.pdfIn PDF document text
- https://s3.amazonaws.com/fikuvine/kabosufegidoteruwevoseta.pdfIn PDF document text
- https://s3.amazonaws.com/limepusotanal/39780856418.pdfIn PDF document text
- https://s3.amazonaws.com/dejolavubukugeb/abbreviation_download.pdfIn PDF document text
- https://s3.amazonaws.com/tapexiw/giant_lenny_face.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2d1440e2-abe8-4948-baaa-3fc29bbe2644/xetokewevimagumapiwom.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dc0bed42-f24e-493c-943c-0c60a6c45835/addons_for_minecraft_bedrock_ps4.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3bd7ddbb-b525-48c1-a12a-7e69cbfbe03b/servios_de_internet_banda_larga.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000de81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE81	6440 bytes
SHA-256: `3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a`
`font_01_sfnt_off0000ee75.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE75	5372 bytes
SHA-256: `811baff2a7e3e91e91a4e3300edd851a0902e5d77180e59029899e3f5863c406`
`font_02_sfnt_off000100ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100AB	10064 bytes
SHA-256: `00d696d4666f2548c45b5f3515eacfc74d8d64c725822893d7bff9a80c4639e7`
`font_03_sfnt_off0001231d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1231D	16284 bytes
SHA-256: `d35ddc6d2707e2460bd6bc3b87c3caeef0a7049dcfffb5ec8cb8324c60fb067f`

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