PDF malware analysis — malicious · b44c0c31dec7e83a

MALICIOUS

PDF

116.0 KB Created: 2021-04-05 10:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 830a88c215ec99364d8e16b4b4dca9bc SHA-1: 8f07ba9b2060fdcf1f745026705d54f38763f787 SHA-256: b44c0c31dec7e83a3b4863db491f5e08303959de3cd04bedc752f20df5d2e719

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to disposable domains and are likely part of a link farm designed to host malicious content or redirect to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document's primary purpose is to drive traffic to these external sites, potentially for malware distribution or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=kenmore+elite+smartheat+quiet+pak+9+he4+dryer+manual PDF link annotation
- http://bonus332.site/koniwavefudasuxutaliwesislzmwh.pdfIn PDF document text
- http://daddytestit.xyz/miss_peregrine_home_for_peculiar_age_ratingdak8s.pdfIn PDF document text
- http://dimax-matrasy.ru/xojikafaluxuxaletalwipis.pdfIn PDF document text
- http://hushseo.online/first_aid_step_1_2021_free_download9c8np.pdfIn PDF document text
- https://gewolurigidanax.weebly.com/uploads/1/3/1/3/131383018/puwumadedasijexi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4419193/normal_5fd7227ceffac.pdfIn PDF document text
- https://jurusaxigudovof.weebly.com/uploads/1/3/4/3/134341302/d4b3b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489441/normal_603e017bd2e9f.pdfIn PDF document text
- http://ezfix.asia/carx_drift_highway_racing_simulatorlmzmo.pdfIn PDF document text
- http://kostlike.site/gibepabanapemuvvt5v.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385217/normal_602ffa780fc30.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4475863/normal_5fcc54be58282.pdfIn PDF document text
- https://devarewiwigunum.weebly.com/uploads/1/3/2/7/132710712/303afe316f4b.pdfIn PDF document text
- http://sarkife.site/how_to_write_a_reflective_essay_examplesln90f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404755/normal_60240ea6028a8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4419633/normal_605a5c8cd2366.pdfIn PDF document text
- http://store50off.info/reglage_baton_de_marche_guidettiut4bp.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://997b2cc2-d96d-4654-b184-8a5d7ad473c0.filesusr.com/ugd/b8d08c_6fba186e0a3e48488c19c81d29c483ec.pdf?index=trueIn PDF document text
- https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_7e47bdb7132c4b4fbe8a8f43da5ad50a.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00016ec3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16EC3	5704 bytes
SHA-256: `c02602627082f4364e6ee3acd57c6adf5723aaf74ff6853f5552fd6c0acf1566`
`font_01_sfnt_off0001820a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1820A	12132 bytes
SHA-256: `80d66f38136feb30f5d313f682b874d3e4e2d6ef63cc6670e238e9be261c6753`
`font_02_sfnt_off0001ab2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1AB2F	16060 bytes
SHA-256: `d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7`

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