PDF malware analysis — malicious · 51d93966cd045b04

MALICIOUS

PDF

76.4 KB Created: 2021-04-27 20:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: f30da0ac342b478f9fda1b1edbbe4cc2 SHA-1: ebe15907c43ed0afdda0435ef4f51f924a947acf SHA-256: 51d93966cd045b04daf67f9a10d75a50bf33114c9589e6f6027ac92d02a4e0e7

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The document body, though heavily obfuscated, contains references to software and a creation date, aligning with a lure for downloading malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=fender+mustang+2+v2+software PDF link annotation
- https://jowifovisafalo.weebly.com/uploads/1/3/4/6/134673378/kurexol_ropubakavokez.pdfIn PDF document text
- http://lelekelosutov.getenjoyment.net/sigma_1200_bike_computer_wheel_size_chart.pdfIn PDF document text
- https://xuzizalebu.weebly.com/uploads/1/3/4/7/134772475/a7c12e8ae006.pdfIn PDF document text
- http://trening-ekaterinodar.ru/65223055232dac50.pdfIn PDF document text
- http://fikosarodone.medianewsonline.com/cara_membuat_cv_file.pdfIn PDF document text
- http://socialwave.me/vatupotinikidogo0l4o.pdfIn PDF document text
- https://lulodepi.weebly.com/uploads/1/3/0/7/130776712/b40ef7d.pdfIn PDF document text
- https://jekodijup.weebly.com/uploads/1/3/4/4/134490718/wemilureti_getixavukavovu.pdfIn PDF document text
- http://suzenax.22web.org/vejosuzejudotidijeg.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
- https://s3.amazonaws.com/fajonubinomeder/brother_lawrence_quotes_kitchen.pdfIn PDF document text
- https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_58a9eba22963467aa32e35343f759bd2.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/nonipesikiri/que_es_un_proyecto_de_investigacin_cientfica.pdfIn PDF document text
- http://xerekexaxo.epizy.com/o_ativista_quantico.pdfIn PDF document text
- https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_8651afaeefd94dcca28079caf562f433.pdf?index=trueIn PDF document text
- http://jajuzefob.rf.gd/79559994623.pdfIn PDF document text
- https://s3.amazonaws.com/rotowan/the_crying_game_imdb_parents_guide.pdfIn PDF document text
- http://muwirosogop.epizy.com/architectural_drafting_tutorial.pdfIn PDF document text
- http://rarejis.epizy.com/bangla_natok_new_mp4.pdfIn PDF document text
- https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_4d76feffe7ca4b74a62cfd58a922b39b.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/bufipevuril/cambridge_dictionary_offline_free_for_android.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_off0000dc33.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC33	5268 bytes
SHA-256: `14f0f38d962119f3fc559df075a87bebb82085eb4710b4f841f5a2b49b0cb287`
`font_01_sfnt_off0000ee0f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE0F	12004 bytes
SHA-256: `525d1b218e0cc990187406a2f8fe5321bd8fca8c37472bcc438fc3ec3459c601`
`font_02_sfnt_off0001150c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1150C	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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