PDF malware analysis — malicious · 68fb780b4943f791

MALICIOUS

PDF

87.1 KB Created: 2021-03-10 02:09:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14

MD5: 2bb2cfc3d9bd1c75c0e70f31aff6b1fc SHA-1: 78d05f5f3b222745d57ed5a26c59b098c307efc8 SHA-256: 68fb780b4943f7915dff9d67239506e0a827622bf8e11cb3ba3875298793458d

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs, with a primary URL pointing to a phishing-related query. The presence of a large number of external links, some on disposable hosting, suggests an attempt to distribute malicious content or redirect users to phishing sites.

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://jottigo.ru/strik?utm_term=how+do+you+run+a+diagnostic+test+on+a+frigidaire+affinity+washer PDF link annotation
- http://digtalcaliper09.xyz/10077003374v1i8a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4463824/normal_5fde883bbcf4a.pdfIn PDF document text
- https://cdn.sqhk.co/lerutefo/5nji1Nd/xodusididuxepenibadevib.pdfIn PDF document text
- https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/vovedud.pdfIn PDF document text
- https://cdn.sqhk.co/tipesewete/a3i0Nja/970812471.pdfIn PDF document text
- http://esclick.pro/xobikavifakejelokosinaeexgw.pdfIn PDF document text
- https://cdn.sqhk.co/josurowelimu/jahia52/pufolitojuruxafonewope.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405184/normal_601b12f95dbb1.pdfIn PDF document text
- https://cdn.sqhk.co/guvelebul/gcJiak7/99088575286.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4504839/normal_6026073fa088e.pdfIn PDF document text
- http://japancar-sib.ru/lufiwifosxemig.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490369/normal_60372ea5c3297.pdfIn PDF document text
- https://cdn.sqhk.co/sobupepokor/hThb8jb/wuzobitepu.pdfIn PDF document text
- http://navalny.design/do_community_organizers_get_paid5fi8w.pdfIn PDF document text
- https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/retasen_zotivelevi_mujipivazexer_fegoriran.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/c0aaff42-20c0-482e-8ef0-aee66d175f5b/ms_project_2019_tutorial_ppt.pdfIn PDF document text
- https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_0e7121f604d94102aea5b1cd18279253.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/39c3456b-5a66-4d35-9e20-672ffc26b2e3/41828986489.pdfIn PDF document text
- https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_e0ea6981742f48c2ad4e16bd7969068c.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/c8640885-6db4-41c8-afbc-71d7fb1de505/78931266108.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_off00010958.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10958	5288 bytes
SHA-256: `0344ebb092e56197631b80e9186f0c77ced20cae254d000d1214a6f7b3f9e156`
`font_01_sfnt_off00011b5d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B5D	10804 bytes
SHA-256: `2ba4d6dcec7e16873fbe51924e224993bb60c34fcbb9a276ea949f1fb0e47bcd`
`font_02_sfnt_off00014020.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14020	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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