PDF malware analysis — malicious · 3ef1748c2c593189

MALICIOUS

PDF

130.7 KB Created: 2021-03-21 00:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: c8d64cdaeb0b3b3ac777c9ed71469817 SHA-1: 524c11dcdfca9055e2c45e90b9273f11ff6bbd66 SHA-256: 3ef1748c2c5931896a565ebc79c0293dc6380f71f44b5d87e6445248e746efd0

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a large number of outbound links, and the ClamAV detection confirms its malicious nature. The document body, though heavily obfuscated, contains keywords like 'pizzazz answer key pre algebra' which likely serve as a lure to attract victims.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/wix?keyword=pizzazz+answer+key+pre+algebra PDF link annotation
- http://faxusigeroles.sportsontheweb.net/bawal_bastos_law.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380070/normal_6037aee977680.pdfIn PDF document text
- https://gikatufezido.weebly.com/uploads/1/3/4/3/134338368/movijibegam-losexi.pdfIn PDF document text
- https://cdn.sqhk.co/fosulavale/hiihij1/mozatutasip.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367625/normal_601d05cd0c0ae.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413866/normal_6025a9522e95b.pdfIn PDF document text
- https://litisenos.weebly.com/uploads/1/3/1/0/131071047/taliwokifidepo.pdfIn PDF document text
- https://cdn.sqhk.co/zofagopipowi/cTSygjd/modern_heavy_duty_tractor_farming_simulator_3ds.pdfIn PDF document text
- http://larijasetejupaz.mypressonline.com/zuzekulotunul.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4477615/normal_5ff60d71a97df.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369183/normal_600aa29133184.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4491152/normal_601a9b68ea839.pdfIn PDF document text
- https://kivubuzer.weebly.com/uploads/1/3/5/3/135332577/joresa_xowoxuwesavo.pdfIn PDF document text
- http://mofirixubutibi.getenjoyment.net/30012977931.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365582/normal_6017f716031a0.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://6b551870-9d71-4c88-87ac-30bafd697196.filesusr.com/ugd/b27e13_7a10e559214944ada995efb9feefddb2.pdf?index=trueIn PDF document text
- http://bamonoxo.onlinewebshop.net/fifth_third_bank_job_application_status.pdfIn PDF document text
- https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_3346e5615c6446d39531b449fcefcf43.pdf?index=trueIn PDF document text
- https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_5d44bbc8e905470c94e08ac6f2b0aa95.pdf?index=trueIn 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_off0001b4b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1B4B0	3200 bytes
SHA-256: `907c585593f44de88d377eb3435c58764ff345674866264af8290570ba9dca8c`
`font_01_sfnt_off0001c02f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1C02F	5436 bytes
SHA-256: `c1dbf4f1bc87e1369fe05d92311bce545e62a27a446a34354b3a91bbb15e33c3`
`font_02_sfnt_off0001d2df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1D2DF	12420 bytes
SHA-256: `14531c3ba9859006eba67034af07d83bf24ae76a21750c189a45bc42655f8324`

Open this report in the interactive analyzer, or submit your own file for analysis.