PDF malware analysis — malicious · cd1f4df718b26045

MALICIOUS

PDF

79.5 KB Created: 2021-03-17 15:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 3d93bdad871d5453f124394a90394171 SHA-1: 287dc4bea2ddc80264d2bba0dd4d297ca54675f9 SHA-256: cd1f4df718b26045f4cabab94b1ba586f7a2ed2d246e4de4753ae5ba19bf9492

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many pointing to disposable hosting services, suggesting a link farm or redirection scheme. The presence of an embedded URL and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent. The document body's mention of 'Htc stock dialer apk' serves as a lure to drive traffic to these malicious URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

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 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://jottigo.ru/wix?keyword=htc+stock+dialer+apk PDF link annotation
- https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/3596755.pdfIn PDF document text
- http://jinobuzid.scienceontheweb.net/72004523364.pdfIn PDF document text
- https://bigadamedoje.weebly.com/uploads/1/3/1/3/131384249/5886424.pdfIn PDF document text
- https://lexizade.weebly.com/uploads/1/3/4/3/134368494/miwabosamugigituv.pdfIn PDF document text
- http://50offstore.pro/jexibigerurozumimosukap9wnj.pdfIn PDF document text
- https://dojosofezi.weebly.com/uploads/1/3/5/3/135390984/eb4de.pdfIn PDF document text
- http://50off.pro/masterchef_yeni_fragman_2020jkh42.pdfIn PDF document text
- http://rimka.xyz/nelasovolikujonufotia3e43.pdfIn PDF document text
- https://fovojewonot.weebly.com/uploads/1/3/4/6/134669065/somoradu.pdfIn PDF document text
- https://midodelawipage.weebly.com/uploads/1/3/4/5/134585137/nowowiva.pdfIn PDF document text
- http://fodekofuxuvum.sportsontheweb.net/xokoninezosibupogaxuk.pdfIn PDF document text
- https://jajesawi.weebly.com/uploads/1/3/0/8/130813829/xefaveseko.pdfIn PDF document text
- https://meximikilub.weebly.com/uploads/1/3/1/4/131406557/9855799.pdfIn PDF document text
- https://dexajaxalujum.weebly.com/uploads/1/3/1/8/131857565/4ba17bbb7.pdfIn PDF document text
- http://polfact.site/39997888541r7ida.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
- http://fazobelo.onlinewebshop.net/23951399954.pdfIn PDF document text
- http://susesibukof.epizy.com/wofemile.pdfIn PDF document text
- https://s3.amazonaws.com/sabegokek/format_code_checkstyle_intellij.pdfIn PDF document text
- http://pagumasobud.rf.gd/xofijeviwepezufubepavoti.pdfIn PDF document text
- http://zupitatip.atwebpages.com/50195741332.pdfIn PDF document text
- https://s3.amazonaws.com/fizaxo/81022568744.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_off0000ebe0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBE0	4772 bytes
SHA-256: `499d33da3e7a90d3e5e5ebfb3cf9f8fdf577926164620315f26312195bd47e1f`
`font_01_sfnt_off0000fc20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC20	11816 bytes
SHA-256: `e217b18d029a35c964882d92965ebbba4de70fe51d0ab867577f138beb454e7c`
`font_02_sfnt_off00012308.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12308	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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