PDF malware analysis — malicious · 6806674d36f35db3

MALICIOUS

PDF

89.2 KB Created: 2021-03-25 15:37:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: b405cdae5d2a8af8aeb02fc32415c6cb SHA-1: d9d386ecb5442a4f5cda348699707b280f77be91 SHA-256: 6806674d36f35db322fd2a8f2d730b5785731fa3084350359e375f91fd6a3b1d

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many hosted on disposable domains, indicating a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

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
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.
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://botokaw.ru/wix?keyword=tamer+guide+bdo+2020 PDF link annotation
- https://lirodenagegoket.weebly.com/uploads/1/3/1/4/131437677/sasafodemerapikegako.pdfIn PDF document text
- https://titumakusijuvap.weebly.com/uploads/1/3/4/3/134353199/6950763.pdfIn PDF document text
- https://letunaxure.weebly.com/uploads/1/3/1/3/131383761/kipidozuvozumutilag.pdfIn PDF document text
- https://mifabawir.weebly.com/uploads/1/3/0/7/130776047/fopuwikiriw.pdfIn PDF document text
- https://zotagozugub.weebly.com/uploads/1/3/0/7/130739891/duzunox.pdfIn PDF document text
- https://berafakeje.weebly.com/uploads/1/3/4/0/134000448/wefawepepovo.pdfIn PDF document text
- https://dasiwijumajofep.weebly.com/uploads/1/3/0/7/130739595/b5742b.pdfIn PDF document text
- https://rebijigubewu.weebly.com/uploads/1/3/4/7/134770847/326913.pdfIn PDF document text
- https://tefuledajejus.weebly.com/uploads/1/3/1/4/131437322/kizurixijonepim_xagevipewowilep.pdfIn PDF document text
- https://madoguwulivusi.weebly.com/uploads/1/3/0/7/130775056/lelofogivel-kenomapor-rulajudixuzetex-bekera.pdfIn PDF document text
- https://rubebukani.weebly.com/uploads/1/3/0/7/130740450/tesuzesoxoladek.pdfIn PDF document text
- https://paxogusav.weebly.com/uploads/1/3/4/0/134040839/9ad9a6.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/kitakilesa/bombay_dyeing_premium_cotton_double_bedsheet.pdfIn PDF document text
- https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_f0fea30dcb2c4a97a85e01160ef5ed34.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/1575a163-ee31-49e9-834e-b6e20f977a24/desevufisen.pdfIn PDF document text
- https://s3.amazonaws.com/bejikefowu/jutikuforuzelowitego.pdfIn PDF document text
- https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_a707593fea1b462696cf270e0cab89bc.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/f6275d2c-de45-485a-8952-a346f2e65576/ruluremipisezupogafe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3be4b130-989a-4e72-bf82-d096d5efcae3/organizing_for_social_change_midwest_academy.pdfIn PDF document text
- https://s3.amazonaws.com/sebunuzu/ball_games_free_for_mobile.pdfIn PDF document text
- https://b81f28a7-a6cc-4df9-aebb-a76b708ee4b5.filesusr.com/ugd/df05b2_facf485b084b4f3cb3242b99fc21824e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/libusamagowuvo/74760730869.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/64152b14-415d-4e19-aecf-03c4dbe3bacb/puzaralofopupatudobojobug.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_off0000ff1f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF1F	5300 bytes
SHA-256: `500ba7c264187e0b94eccd12ab6ca30dcf394df3977bb6d80431af042ef3ad19`
`font_01_sfnt_off00011102.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11102	1800 bytes
SHA-256: `51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0`
`font_02_sfnt_off00011990.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11990	11036 bytes
SHA-256: `d3949216221d757eded436480622c7097329345a428e379a1dfbc25c08f17cac`
`font_03_sfnt_off00013f67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13F67	17088 bytes
SHA-256: `7ee086c033d9ef84912c54ade6af7e9f574a96d50dc1951c608a15ee71dc02f1`

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