PDF malware analysis — malicious · 530eeb0f52b3d517

MALICIOUS

PDF

88.6 KB Created: 2021-05-29 04:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: c7c9a0fcef3b42f2f28bf219a199bc75 SHA-1: 4b98d113f3fed993c13e0c9cd87513abbbc43704 SHA-256: 530eeb0f52b3d51704e009fc5ab0149ebe5954d0f5c8e2520ee1569b02cbf163

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users. The presence of a URL with 'mod apk' in the query parameters indicates a lure for potentially malicious software downloads. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing and malware distribution intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/123?utm_term=super+toss+the+turtle+mod+apk+2019 PDF link annotation
- https://detabusikiz.weebly.com/uploads/1/3/6/0/136022277/zazuvezuxizuxilix.pdfIn PDF document text
- https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/3823d25276.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4476420/normal_5ff6a3635dc68.pdfIn PDF document text
- https://vobodida.weebly.com/uploads/1/3/4/7/134716614/f61a2.pdfIn PDF document text
- https://riledamulobav.weebly.com/uploads/1/3/0/9/130969772/f390c.pdfIn PDF document text
- https://rulodewarozuw.weebly.com/uploads/1/3/4/6/134678260/xiwafazuxivabo.pdfIn PDF document text
- https://gipegilut.weebly.com/uploads/1/3/4/6/134699389/099b75f84532572.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4421788/normal_600344a79d0eb.pdfIn PDF document text
- https://warasogufav.weebly.com/uploads/1/3/4/4/134440103/wimumitix-susemijejiradut.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4463298/normal_602662c0b6d0e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453718/normal_606998c24c9b6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368487/normal_602309edde3f5.pdfIn PDF document text
- https://ritixiduj.weebly.com/uploads/1/3/5/3/135308555/9392851.pdfIn PDF document text
- https://vefaruturibil.weebly.com/uploads/1/3/4/5/134525254/zisowiduxim_nomixowiragefe_tufevon.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4493245/normal_5fcaf76998a78.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4410027/normal_5fc7d5f19c26e.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/39de168c-19c1-49e4-b564-744dff045bd3/jawbone_mini_jambox_bluetooth_speaker.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e9ad6e90-b74b-4228-a22c-6efb1de8fbeb/gunaxonubomefatukelemes.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/801945f1-7a20-4ebd-88c8-8a5d53c2163a/jetpack_joyride_unblocked_44.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7e34343b-6f88-42ed-960c-c4b8f371fe3a/84192641254.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/26784f58-9aa3-4148-85c2-11cb03970100/warhammer_40k_rulebook_6th_edition.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9b39d9b5-4ec5-4df2-abd1-08e0bf72b7d7/christmas_carol_1984_movie.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ec6d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC6D	5848 bytes
SHA-256: `53760dac6eaf2370f66e1c93104e19dc75ccbd07701f8a02d7ed81fa27b0fa3a`
`font_01_sfnt_off00010023.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10023	26908 bytes
SHA-256: `97af9e90e74ec316a0e3ac3655b31e0f5eaf6d76045ed8fc275e309e00335af1`
`font_02_sfnt_off00013de1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13DE1	16144 bytes
SHA-256: `f0a8b786da721c7415a59d91fbce3b20bbb98ea32e48857ac1ff22d53b00ec29`

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