PDF malware analysis — malicious · bbecf9df0dabc6e5

MALICIOUS

PDF

88.6 KB Created: 2021-05-27 08:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 6c5cfbf22ca6988de1c5d591c9dcb126 SHA-1: 89906d3dc37b718e5f5a6730e2cee405ec363e33 SHA-256: bbecf9df0dabc6e574608a3c8ee47ac053fe243db9544145251b16398e2f3ee7

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URL `https://jottigo.ru/strik?utm_term=que+es+fuerza+electromotriz+fem` is a primary indicator of this activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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://jottigo.ru/strik?utm_term=que+es+fuerza+electromotriz+fem PDF link annotation
- https://cdn-cms.f-static.net/uploads/4369322/normal_601332055ec87.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367640/normal_605f7afe15d97.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390383/normal_60675f2988f45.pdfIn PDF document text
- https://dexajaxalujum.weebly.com/uploads/1/3/1/8/131857565/7851284.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4503387/normal_5fe225846cdd9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4468838/normal_6015235bedd95.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379973/normal_60588de8bb3b3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367312/normal_6062bac25be91.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454301/normal_602ad727d3712.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485001/normal_6010636627363.pdfIn PDF document text
- https://jumofawulagap.weebly.com/uploads/1/3/4/4/134486933/5247669.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389127/normal_603df9e73cd4c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4471475/normal_5fdf8fa81e97e.pdfIn PDF document text
- https://kogavegi.weebly.com/uploads/1/3/4/8/134873631/4317598.pdfIn PDF document text
- https://wufujaxuwagax.weebly.com/uploads/1/3/4/4/134400484/xoluviremawipova.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382189/normal_60270f54bc4c4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366348/normal_5feee74a2deb2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413373/normal_603f331df39cb.pdfIn PDF document text
- https://leximefowa.weebly.com/uploads/1/3/2/6/132680903/mafofolu.pdfIn PDF document text
- https://lulipexo.weebly.com/uploads/1/3/5/2/135294167/bodepevemurizad.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4487918/normal_60149578d0f2b.pdfIn PDF document text
- https://nixalimug.weebly.com/uploads/1/3/2/6/132680811/dizinenebonow.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://uploads.strikinglycdn.com/files/fd56f096-4f51-461c-a217-21b06a9599dc/lexilo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/df790a87-f760-4a05-ae4e-55d27530d77c/vekebuxogowenuwu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ba546c7e-9840-49b9-9a4b-8b9268d28154/club_car_golf_cart.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f42d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF42D	4916 bytes
SHA-256: `d94bafa0f474408520833667a9c4d6fbea52a3065c40aef4fbfbcb38d1a26982`
`font_01_sfnt_off000104f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104F0	13200 bytes
SHA-256: `2435e0e7744a30e00c1306680a8ae8939990b3893b2db0082ae56e615adc4992`
`font_02_sfnt_off000130b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x130B7	16060 bytes
SHA-256: `b10e7a0583bf6b216a5471aeed10f14210f1dda3adb60ac5169fcb38ba12e60c`
`font_03_sfnt_off00014547.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14547	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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