PDF malware analysis — malicious · a6e1435f2d156a81

MALICIOUS

PDF

75.1 KB Created: 2021-01-17 20:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 9fe0b53355918d009da789fbf1dbedf1 SHA-1: 957be06e9341fd237c3a149109f58b6a5eeda9a3 SHA-256: a6e1435f2d156a812ed02244366be7a4d9721ac434967e4b2c36bdb1962265db

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute potentially malicious software. The presence of ClamAV detection and ML classification further supports its malicious nature. The embedded URLs and the document's structure indicate an attempt to trick users into downloading software, likely through a phishing or social engineering tactic.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=descargar+towelroot+v3+apk PDF link annotation
- https://fofifakexetag.weebly.com/uploads/1/3/4/3/134345684/6797b7432.pdfIn PDF document text
- https://cdn.sqhk.co/koditisalupe/8FoL62w/shadow_legends_stickman_revenge_hack_apk.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4405419/normal_5fc7c32ee5a92.pdfIn PDF document text
- https://kadefetu.weebly.com/uploads/1/3/4/4/134471860/3168543.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370057/normal_5fa76c9c0571f.pdfIn PDF document text
- https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/0761259d4ac30a.pdfIn PDF document text
- https://varovugunigode.weebly.com/uploads/1/3/4/4/134480676/a8f2d95caffbd26.pdfIn PDF document text
- https://cdn.sqhk.co/biluvetizom/Nahh8gg/butimiwifedojojogomikidaf.pdfIn PDF document text
- https://bekitatabegoze.weebly.com/uploads/1/3/0/7/130775701/busuporilulagobawal.pdfIn PDF document text
- https://zodutobaziji.weebly.com/uploads/1/3/1/4/131408241/9621739.pdfIn PDF document text
- https://cdn.sqhk.co/nedupugifuka/hg1gcp6/islanders_goalie_2020.pdfIn PDF document text
- https://site-1177285.mozfiles.com/files/1177285/assessment_techniques_in_education.pdfIn PDF document text
- https://gakuzelidojipo.weebly.com/uploads/1/3/4/3/134395763/0c5251a.pdfIn PDF document text
- https://site-1083588.mozfiles.com/files/1083588/descargar_terapia_intensiva_sati.pdfIn PDF document text
- https://site-1168055.mozfiles.com/files/1168055/goredasatodedamun.pdfIn PDF document text
- https://site-1177531.mozfiles.com/files/1177531/xefotananum.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://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_off0000dd37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD37	5112 bytes
SHA-256: `d4fcf05cf99ded0049e074eb2228a091c22d45b2e3aea217024dc10cd947652a`
`font_01_sfnt_off0000eed2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEED2	10188 bytes
SHA-256: `74bc4410664ee9f95266c9e2087217f55e37f31805642ec2c25a043310c3e8e3`
`font_02_sfnt_off00011197.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11197	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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