PDF malware analysis — malicious · 82cafcb58851d3d6

MALICIOUS

PDF

116.0 KB Created: 2021-02-24 15:37:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b1903f55747d95a2351755bddf599ad6 SHA-1: 6c1feea40312d9031dfb5f6a0e12d5b3628e298e SHA-256: 82cafcb58851d3d69d86b263ec5b872c60a04ef2f0255562e3f648ce0fe537d3

212 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector. The heuristic firings indicate this PDF is designed as a link farm, likely to distribute malware or phish for credentials. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the embedded links are the primary attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9046

Heuristics 4

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://yafferge.ru/award?keyword=aja+ki+pro+ultra
- https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/837890.pdf
- https://migijulomav.weebly.com/uploads/1/3/5/3/135394851/4b5d8573ca525.pdf
- https://cdn-cms.f-static.net/uploads/4390382/normal_6009b3b725fe1.pdf
- https://cdn-cms.f-static.net/uploads/4467560/normal_601f177406424.pdf
- https://mubazujozij.weebly.com/uploads/1/3/4/7/134705676/3953231.pdf
- https://reravojune.weebly.com/uploads/1/3/1/4/131406269/zedujex_dilamanusob.pdf
- https://static.s123-cdn-static.com/uploads/4445564/normal_5fedca116fe19.pdf
- https://static.s123-cdn-static.com/uploads/4377408/normal_60069f9bd21fa.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/devuxuzejozam/sql_timestamp_format_milliseconds.pdf
- https://s3.amazonaws.com/toliwudalamem/icloud_photos_won_t_to_mac.pdf
- http://zitasixan.atwebpages.com/twilight_breaking_dawn_part_2_soundtrack_cd.pdf
- https://s3.amazonaws.com/nasitevu/batman_forever_font_apk.pdf
- https://s3.amazonaws.com/litunux/nutritional_information_in_canned_salmon.pdf
- https://s3.amazonaws.com/wozoxub/general_science_physics_questions_in_hindi.pdf
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000179ee.bin` `fed14da5be92f363bbac7cf020299179a497ff84a957b60ba8916e597ad90710`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x179EE	20320 bytes
`font_01_sfnt_off0001b56b.bin` `e5ffb3aa802984f3f801975a5a6d7a141820c8c7d9a445b6d023d84d4dd91ff7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1B56B	4764 bytes

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