PDF malware analysis — malicious · 998a548b37681340

MALICIOUS

PDF

81.9 KB Created: 2021-06-08 04:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 017646e7a49776bef2afa34876e70ab7 SHA-1: cf9bac99b7b32e501b8c4690afcd8577aca90ea9 SHA-256: 998a548b37681340b587f698c7e7758cd35d06040ef8d595ff8d9bdf97f9ce2f

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable hosting and exhibiting characteristics of a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to infer a malicious attack pattern.

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://huntic.ru/pbw?utm_term=what+are+the+different+types+of+farming+in+india PDF link annotation
- https://zogazipo.weebly.com/uploads/1/3/2/3/132303407/72f39.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4484624/normal_5ffd0bead4fd2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450244/normal_6035fa9f74638.pdfIn PDF document text
- https://nekazadezi.weebly.com/uploads/1/3/4/6/134662300/e68e00217.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450639/normal_5fdbde7b396dd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454180/normal_601e6f8b1e883.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369306/normal_5fdc408c06250.pdfIn PDF document text
- https://sonodube.weebly.com/uploads/1/3/7/5/137517068/jolazolikaki_lapoxigufozu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4378845/normal_5ffa77f6d17e1.pdfIn PDF document text
- https://jodavetofa.weebly.com/uploads/1/3/1/4/131438562/mitupipifa_mapopado_wupik.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424689/normal_6069145150023.pdfIn PDF document text
- https://funovupudejo.weebly.com/uploads/1/3/4/4/134473131/busogubegifozopafu.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4428342/normal_60b3977adeba6.pdfIn PDF document text
- https://dovilukimiju.weebly.com/uploads/1/3/0/7/130776072/7d8ae5b08bc3e0.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/25ccea81-b1b0-428b-abae-f94720b74c76/what_were_causes_of_great_depression.pdfIn PDF document text
- http://xojifot.pbworks.com/f/fufabo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f0f16d46-08da-4866-9592-65ef2efcd438/91902043872.pdfIn PDF document text
- http://vamafob.pbworks.com/f/pidevanuxobumegenape.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d5f3e0bb-b74b-498b-9ada-70a0720ca96b/russian_alphabet_cursive_letters.pdfIn PDF document text
- http://rujuboxu.pbworks.com/f/why_is_my_usps_tracking_not_updating.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e6716bf3-9e32-43c0-acbd-40aa85430bcc/91003930010.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_off0000f509.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF509	5328 bytes
SHA-256: `13b4c528ac27d25147f11ce762ba9b5dcc741b880638c31946375b3d9c17dec4`
`font_01_sfnt_off0001070c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1070C	10676 bytes
SHA-256: `b7230fe41b4bf23a96e78a006ba71793d742ddbdc3cb93fc54e9fbdc9bfd2c7d`
`font_02_sfnt_off00012b90.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B90	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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