PDF malware analysis — malicious · 57244f03f3c45053

MALICIOUS

PDF

89.0 KB Created: 2021-04-04 00:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: 9ea50e794f0b77ee0189211520b07e1a SHA-1: 56a55d52ce60038da71bcf46cbb301a3cd3608d6 SHA-256: 57244f03f3c45053de06d007ff5ad261ffbee2ba92f8685ccec0dc109e0b0648

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to PDF manipulation, likely a lure to disguise the malicious nature of the links.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/award?keyword=comment+fusionner+2+pages+pdf+en+une+seule PDF link annotation
- https://cdn-cms.f-static.net/uploads/4450504/normal_605c6177d4187.pdfIn PDF document text
- https://cdn.sqhk.co/lekifuwixal/Qzi5ijQ/handmade_diy_slime_simulator_2.pdfIn PDF document text
- https://cdn.sqhk.co/nixibaraje/ghhgcVC/vosafitesi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393925/normal_60270a628b829.pdfIn PDF document text
- http://groshyk.site/33008558230bzd2o.pdfIn PDF document text
- http://pakekoramiduwin.getenjoyment.net/xetixipenezadalitabazi.pdfIn PDF document text
- http://vk-settings-change.online/apple_tv_4k_buyers_guidefknm7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4466165/normal_5feebb5dc99f0.pdfIn PDF document text
- http://republvinb.fun/aksara_sunda_lengkapqleyl.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456369/normal_603a90ab7b7d0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4496616/normal_5fd7908deb26d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383915/normal_600d0445a6963.pdfIn PDF document text
- https://cdn.sqhk.co/noligigibar/44kjfgd/toilet_finder_app_australia.pdfIn PDF document text
- https://cdn.sqhk.co/rekutadis/gfOJp3Q/86895465743.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/7bdd571d-bd80-4843-8b10-c561dc8863a8/xabakokifibijobowofazawo.pdfIn PDF document text
- http://nowimirozox.atwebpages.com/android_eclipse_tutorial_step_by_step.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8f5baad3-9674-4171-8ad5-d3e7ae3f0abd/67427161355.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/330c2493-f375-4271-800e-124f441ed221/us_army_toc_operations.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/535c792c-481a-40b4-bc76-e4a3a8cc6154/zutipajijunitemanipeba.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3b11ffc9-69fa-496b-9798-8b6fca0adea3/the_secret_book_ebook.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_off0000f2f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2F7	5396 bytes
SHA-256: `215d67dc3be4c8b66498db3ff2776472cb41ab73f803e72e75a878d040593cfd`
`font_01_sfnt_off00010535.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10535	12948 bytes
SHA-256: `36f264b3b6677ffb79321271d602a7cb30f7eef090d2d946d3b729678d1b7785`
`font_02_sfnt_off00012f5e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F5E	16936 bytes
SHA-256: `c9fab91c328eb8fc5a78493adea2cffae85ed113b7e113287f02aa4bc384fc08`
`font_03_sfnt_off0001461c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1461C	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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