PDF malware analysis — malicious · 20a3c18651248190

MALICIOUS

PDF

79.3 KB Created: 2021-03-11 04:30:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: ba7d7d5fe02dba605077102c9b9391e5 SHA-1: a1f83b27f314310103adaf7854344e198967effb SHA-256: 20a3c18651248190ca674c1987d3b8500d7fc960c653ce83e6498296e914b969

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains obfuscated text and multiple embedded URLs, many of which point to disposable domains or link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and link farm heuristics suggest the document is part of a larger campaign to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

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 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/award?keyword=certificat+de+cession+v%25C3%25A9hicule+pdf+remplissable PDF link annotation
- http://waniwidolo.66ghz.com/tufakawa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405654/normal_60176b753021c.pdfIn PDF document text
- http://natikolom.site/nawenudoreruuy2oc.pdfIn PDF document text
- http://dakuximakux.22web.org/95559978240.pdfIn PDF document text
- http://axecheat7.xyz/troy_bilt_mower_bagger_partshvh2k.pdfIn PDF document text
- http://myshoes.moscow/69736850704q2ptb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4486353/normal_5ff538ddb3371.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379744/normal_60361167998ef.pdfIn PDF document text
- http://fabermanufacture.ru/lexaduvaneml9rbc.pdfIn PDF document text
- http://hookup755.fun/witajavemajerevow1ezut.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://7211abc3-b26e-437e-abd8-8a8c7ebd4af5.filesusr.com/ugd/0683fb_db9b0f9d91984d38ab7222c49e1e7637.pdf?index=trueIn PDF document text
- https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_aa1479a607f24a2197d54e21191f7f57.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/ddaf20a3-438e-47b0-bed1-a980df5bc875/aa_12_traditions_in_spanish.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f2381176-c6c9-4fa6-9b39-b074bb9f0791/zifiwijit.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f05c8051-f7cb-4d45-b402-a369d7dad306/how_to_find_square_root_on_ti_36x_pro.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7bad929e-0b3d-4b62-bc75-498f0e8a001e/wubanejesag.pdfIn PDF document text
- https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_acd00654387e46c784ea81a762b81842.pdf?index=trueIn PDF document text
- http://menimilerawapo.rf.gd/wopimoguwow.pdfIn PDF document text
- https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_ed5d0dbd5a6a4b56be93c82db98236b3.pdf?index=trueIn PDF document text
- https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_f7ed135e538a41078bbbd36758e81dfd.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/7a2b966e-89f7-42a3-8658-61e6517c154c/wapenazenuxur.pdfIn PDF document text
- http://lokemuwebofeg.rf.gd/biomaterials_science_free.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_off0000ea0e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA0E	5644 bytes
SHA-256: `5c9464969d8e3ac8920ada5acd8afec989061c27bce79f3d5285f11ca6dff0d6`
`font_01_sfnt_off0000fccb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCCB	1852 bytes
SHA-256: `a0007d79d67dcff13d53cd43fae07f32686197cceecd610c93d253f2b9616ab2`
`font_02_sfnt_off000105de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105DE	12144 bytes
SHA-256: `bd0a32d4816fdf959f95d72e2145f4b094305f827143ecc1c2242d177d2809d6`

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