PDF malware analysis — malicious · f1d7392aacc81905

MALICIOUS

PDF

81.0 KB Created: 2021-02-12 04:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: c437201bb0048e236e125406b7d73f17 SHA-1: 3b1466d6c329d43d7c303b10547785ea9c097ff0 SHA-256: f1d7392aacc81905a63032029e62d287e34474af65c470c693f247bb11d60d12

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary one pointing to 'bologen.ru', suggesting a lure to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of using disposable hosting for malicious links, reinforcing the phishing or malware distribution intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/wix?keyword=trigger+happy+havoc+gift+guide PDF link annotation
- https://static.s123-cdn-static.com/uploads/4412584/normal_6008b4aa69c2b.pdfIn PDF document text
- https://tutowori.weebly.com/uploads/1/3/5/3/135317166/nuwotum.pdfIn PDF document text
- https://lijemokuw.weebly.com/uploads/1/3/4/8/134853622/peguzavefefari.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373776/normal_5fe91424e5442.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416918/normal_600c5fb183b84.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4463264/normal_6015d6762e3cb.pdfIn PDF document text
- https://pudebotajiv.weebly.com/uploads/1/3/4/0/134012430/bovukedib.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4454990/normal_5ffb7b832203e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4389797/normal_5fcd734192b06.pdfIn PDF document text
- http://jipigebewojafof.22web.org/benim_hocam_trke_2019.pdfIn PDF document text
- https://derovidexaw.weebly.com/uploads/1/3/1/3/131382126/1440364.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4412413/normal_5fd04e560bfed.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373776/normal_60235e7dd2c99.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/wutogugej/79275908650.pdfIn PDF document text
- http://pebulibupa.rf.gd/jurnal_ampisilin.pdfIn PDF document text
- https://s3.amazonaws.com/garorowa/97051566068.pdfIn PDF document text
- http://xewebumobodoris.rf.gd/theri_background_music_tamil.pdfIn PDF document text
- http://webukoxaxox.rf.gd/sejawa.pdfIn PDF document text
- http://dipozarevew.epizy.com/redugixorexobadefigog.pdfIn PDF document text
- http://puxagere.epizy.com/linear_interpolation_worksheet_tes.pdfIn PDF document text
- http://solukirakologi.epizy.com/kobolds_and_catacombs_dungeon_run_shaman_guide.pdfIn PDF document text
- https://s3.amazonaws.com/gazitif/pa_mandated_reporter_training_how_many_sections.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
- 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_off0000d7d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7D3	5480 bytes
SHA-256: `4630ccb8f2c7816316a8f98a03f3a165acbfd2e7cd6f3b450be7e0e45b5fb8c6`
`font_01_sfnt_off0000eac8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEAC8	5320 bytes
SHA-256: `3f2a2061c7a6ca355dde2bb8f5bbd578118f5ff2b1a060296948f668dad472ac`
`font_02_sfnt_off0000fcee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCEE	10604 bytes
SHA-256: `a96820ef608fd842929a3939734eeb6dc5ce5d8a2125845bbcc0e41b8ae084ff`
`font_03_sfnt_off000120f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120F6	16124 bytes
SHA-256: `36a28aaaffbd3381786fd0701e80cd996653b54bc0b47d8271703b36bed5eba6`

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