PDF malware analysis — malicious · 036f177ca43969e1

MALICIOUS

PDF

74.8 KB Created: 2021-03-09 10:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 9b647ef26419780b4246bd7a26a6cd08 SHA-1: da31c60cd011cc8c10b237dafdbaf43fadd91ad0 SHA-256: 036f177ca43969e1aff4e1c568712a5aedca11f1cf37a0f9a216490debcfa790

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One URL, https://mezovuduw.ru/123?utm_term=firefox+focus+apkmirror, is directly embedded and likely serves as a lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/123?utm_term=firefox+focus+apkmirror PDF link annotation
- https://cdn.sqhk.co/gitesafuwu/qriesSQ/bimagawigerusofa.pdfIn PDF document text
- https://bakasilamor.weebly.com/uploads/1/3/1/4/131407315/758586a19461.pdfIn PDF document text
- https://lolijejolo.weebly.com/uploads/1/3/4/4/134442146/donarojumedik-fakosi-losum.pdfIn PDF document text
- https://cdn.sqhk.co/pibepufas/e2jdf9y/easy_cake_recipe_without_egg_at_home.pdfIn PDF document text
- http://ig-mediateam.net/tetadenikedadavimiribonwmdxt.pdfIn PDF document text
- http://yachts-4-sale.com/xopijafexovefoxopakikxq0q0.pdfIn PDF document text
- http://vafutixon.22web.org/how_to_calculate_how_much_oil_is_in_a_tank.pdfIn PDF document text
- https://cdn.sqhk.co/bawusipa/7eVqM15/knife_sharpener_electric_ebay.pdfIn PDF document text
- https://lalusaguru.weebly.com/uploads/1/3/4/6/134611329/4380816.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://kajonamopesubom.rf.gd/wagner_airless_spray_tip_guide.pdfIn PDF document text
- https://s3.amazonaws.com/zufaxepixiguxax/is_true_polymorph_permanent.pdfIn PDF document text
- https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_c2f3e285894145b6a0d9207610d8922f.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/goneduzum/lukojidipigozaminukiw.pdfIn PDF document text
- http://varaxekewuveza.epizy.com/55749357971.pdfIn PDF document text
- https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_44143b5e411c4ce6b1702cf00a12d67b.pdf?index=trueIn PDF document text
- http://fukesok.rf.gd/batla_house_full_movie_hd_2019.pdfIn PDF document text
- https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_9f5894e712a244ce8f2e5527ca4ce0ac.pdf?index=trueIn 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_off0000c6af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6AF	4912 bytes
SHA-256: `aa74a23a6ffc3d49c4da6318ec39de438d5c42e7b1b2e3c67692d3773053789a`
`font_01_sfnt_off0000d772.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD772	10180 bytes
SHA-256: `a7c893cccf40f8105f59ec7a6c26ffe7c2bdc356f7df80af060ceba29187d403`
`font_02_sfnt_off0000fa92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA92	16092 bytes
SHA-256: `39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67`
`font_03_sfnt_off00010f59.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F59	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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