PDF malware analysis — malicious · f17b63bbd8ea88f4

MALICIOUS

PDF

83.6 KB Created: 2021-03-09 18:30:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 08d0cd9ad4f4604d6d4ef7d995ba4529 SHA-1: 81db86f80a7975616639389abe6e85335b7ba9ad SHA-256: f17b63bbd8ea88f4a0859e9fe41578ec6cfa9f3f04e5153106dfec3570e6e9d4

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'druttle.ru', suggesting a phishing or malware distribution lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is designed to redirect users to multiple potentially malicious sites. No scripts were extracted, but the overall structure and URL distribution point to a phishing or malware delivery attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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 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.
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://druttle.ru/123?utm_term=bibliography+format+in+research PDF link annotation
- https://cdn-cms.f-static.net/uploads/4387410/normal_6030a17372928.pdfIn PDF document text
- http://idealslimitalia-ufficiale.site/517950042820y8ni.pdfIn PDF document text
- http://physcoo.com/362127058p04iu.pdfIn PDF document text
- http://sewakasatixori.medianewsonline.com/basics_of_electrical_and_electronics_engineering_free.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4422145/normal_603b29204cfdd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366965/normal_602158e7df710.pdfIn PDF document text
- http://bilkan.fun/combinations_and_permutations_questions_and_answersgzsd9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388407/normal_601b3583834f1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4482863/normal_60255807dbcfa.pdfIn PDF document text
- http://tijudozi.scienceontheweb.net/bagifojowemapa.pdfIn PDF document text
- http://kumorepo.22web.org/can_i_use_5w30_instead_of_sae_30_in_my_lawn_mower.pdfIn PDF document text
- http://blancer.xyz/pulavodipodemamebotu72023.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://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_6c00c166cd9b48b6815ff4cd371b5247.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/sigobija/tybcom_syllabus_mumbai_university_2018-_19.pdfIn PDF document text
- http://wutodabegaf.epizy.com/lirexitibukegoboxo.pdfIn PDF document text
- https://s3.amazonaws.com/vunizi/72272392126.pdfIn PDF document text
- https://s3.amazonaws.com/senodiw/60661446675.pdfIn PDF document text
- https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_f09cbc27c0134f70838cf69c159daf2a.pdf?index=trueIn PDF document text
- http://bekujefil.epizy.com/scert_up_ntse_form_2020.pdfIn PDF document text
- https://s3.amazonaws.com/jizubisetebof/nanavugivusugalip.pdfIn PDF document text
- https://s3.amazonaws.com/bisazabe/old_telugu_movies_utorrent.pdfIn PDF document text
- http://tasanixuzapavo.epizy.com/16557830286.pdfIn PDF document text
- http://duxegejuw.atwebpages.com/marlin_model_81-dl-22_cal-s-l-lr_for_sale.pdfIn PDF document text
- http://masomivi.rf.gd/math_equation_solver_apk.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_off0000fbd1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBD1	5508 bytes
SHA-256: `226a006c3b267cc08f898ee56911f284bd2fbb6b2a2c6ed92bc29e9e08524075`
`font_01_sfnt_off00010e61.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E61	10632 bytes
SHA-256: `c5425f9d6dc1b4fd2a6a02149a96bb5c98af1c372388dd2e05d4ba33b586196c`
`font_02_sfnt_off00013250.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13250	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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