PDF malware analysis — malicious · 6eeb794e11a97c1f

MALICIOUS

PDF

71.5 KB Created: 2021-03-01 17:29:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 37d03b52ac5b91b406849ac9b0fcb66f SHA-1: 8c1e7d03acfbad3a1d6388270a102c34bdb81edf SHA-256: 6eeb794e11a97c1f5df66bb8dafaacdc15c7c245151a95ba1a05afaef02b64a4

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though partially corrupted, contains keywords related to technical support queries, indicating a lure to potentially malicious external sites. The presence of multiple PDF URI heuristics and a high ML classifier score confirms the malicious nature of the document.

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://maypoin.ru/wb?keyword=how%20do%20i%20turn%20on%20my%20bose%20solo%20without%20the%20remote PDF link annotation
- https://lejimawemo.weebly.com/uploads/1/3/0/7/130739028/liviwazis.pdfIn PDF document text
- http://tameenegypt.com/2019_ford_mustang_super_snake_hpw5fr3.pdfIn PDF document text
- https://jipunusib.weebly.com/uploads/1/3/0/8/130813609/e86dafc3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424009/normal_5fd618e2e49b1.pdfIn PDF document text
- https://bizonununifewe.weebly.com/uploads/1/3/4/7/134773553/devevoje.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4468563/normal_6002b2f338734.pdfIn PDF document text
- https://seruborakumew.weebly.com/uploads/1/3/4/8/134849990/rebukobamiwivu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4382418/normal_5fee6fc12c426.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4468294/normal_6006e49b82f43.pdfIn PDF document text
- http://monoga.space/title_page_templates_freehwq23.pdfIn PDF document text
- https://luvabuzizav.weebly.com/uploads/1/3/5/2/135294148/88bd8090b7f5c3.pdfIn PDF document text
- https://zejebamusij.weebly.com/uploads/1/3/2/3/132302936/nobamatifo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413345/normal_60272e4f87316.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481852/normal_60302b1c0c401.pdfIn PDF document text
- http://pumba-timon.space/does_night_owl_security_have_audio6210u.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://timaroxakex.epizy.com/dnd_5e_cleric_spells.pdfIn PDF document text
- http://rasunafosav.epizy.com/jebumufelewopoxazijefimi.pdfIn PDF document text
- http://xonikinoforekan.rf.gd/la_riqueza_de_las_naciones_libro_1.pdfIn PDF document text
- http://bepukefaxefewe.rf.gd/bluestacks_android_emulator_windows_8._1.pdfIn PDF document text
- http://zevuketeno.rf.gd/zurugopesu.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_off0000cca3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCCA3	5032 bytes
SHA-256: `e68a049cd2b67b08e8e6047efa678a6e60226eb6119aff04395ed7aff5b427fc`
`font_01_sfnt_off0000dd99.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD99	10080 bytes
SHA-256: `9d7b1cb75cd003da9350a5603794c8e232464deba3b60cd40d8b79b355fe90fc`
`font_02_sfnt_off0001002c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1002C	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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