PDF malware analysis — malicious · a16c61627cd17a04

MALICIOUS

PDF

78.8 KB Created: 2021-03-20 07:59:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: a3afe5873f7164c9d92c286e6a40b22f SHA-1: c697394006bc8032553b63cbdd552a919aeb0a2e SHA-256: a16c61627cd17a0476bacaa6fbc32be81ef348ea13f1e3e1e26426730c309c7b

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and an ML classifier, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, directing users to numerous external URLs, one of which is explicitly for 'battery operated hair dryer for camping australia', suggesting a deceptive lure. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=battery+operated+hair+dryer+for+camping+australia PDF link annotation
- https://cdn.sqhk.co/sozimelizak/iigjiiV/heart_touching_quotes_about_love.pdfIn PDF document text
- http://wisatemubudu.medianewsonline.com/alphonso_dunn_pen_and_ink_drawing_a_simple_guide.pdfIn PDF document text
- https://bevubulik.weebly.com/uploads/1/3/2/6/132680874/kuburukusivebiporup.pdfIn PDF document text
- http://stalekost.site/appareil_gnital_masculin_fonctionnementaai0o.pdfIn PDF document text
- http://wide-do.top/64923225362pe1qt.pdfIn PDF document text
- https://cdn.sqhk.co/zogobadakedu/ejeSies/bubble_bobble_nes_release_date.pdfIn PDF document text
- http://dejepuzalew.mygamesonline.org/autodesk_sketchbook_mobile_tutorial.pdfIn PDF document text
- https://zigivigafa.weebly.com/uploads/1/3/5/3/135392575/2104577.pdfIn PDF document text
- https://cdn.sqhk.co/mofosalamo/iiXibgg/geometry_dash_subzero_mod_apk_ios.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://b147a2f3-58af-4013-9def-597e86e94513.filesusr.com/ugd/47d6bb_86d3149109234060a96a26e182811e02.pdf?index=trueIn PDF document text
- https://efed9c07-4553-4484-a419-1b844d271aeb.filesusr.com/ugd/6f475a_f46c971f9e7b4fc6824205923d3ae2be.pdf?index=trueIn PDF document text
- https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_0badac2bf5a240f0aef15eae3230f5ad.pdf?index=trueIn PDF document text
- https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_0250b134406d45458025ccd2c37c1c38.pdf?index=trueIn PDF document text
- http://pekafujojef.onlinewebshop.net/63784595793.pdfIn PDF document text
- https://4ceac43d-3374-4736-8926-b47930641487.filesusr.com/ugd/3b1191_c4028a7526b04f44997f464a138f2d4c.pdf?index=trueIn PDF document text
- https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_5eee69744a784bfdbfef3eff14cf3b32.pdf?index=trueIn PDF document text
- https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_5ad4b2c8fae245f8bbb281f86391034c.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e8a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8A9	5600 bytes
SHA-256: `0a788b45b951ba859af116eb85f2261a3eae5ca752358df53420a7a1069e844d`
`font_01_sfnt_off0000fb9a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB9A	10636 bytes
SHA-256: `6cd26fc76ec6ac04be7327dc0dc616453fa76dd9f010609674dbddebd7562dea`
`font_02_sfnt_off00011fa1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FA1	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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