PDF malware analysis — malicious · a248bdecfd8e66f3

MALICIOUS

PDF

126.9 KB Created: 2021-03-02 12:26:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 0227f6e9ab1f1435a099ca93e3841ff3 SHA-1: 66214ca13105d1087c7a20765b700ce1b7976a71 SHA-256: a248bdecfd8e66f3c11d5189bd9aa30a69cd5f26e4aa9f77790f8a8cd2cdb65a

246 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ClamAV and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document attempts to trick users into revealing sensitive recovery secrets or private keys. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 7

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.
Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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/award?keyword=vba+programming+access+2016 PDF link annotation
- https://gipafefigemer.weebly.com/uploads/1/3/4/0/134097902/vodelakobe.pdfIn PDF document text
- https://jajozopikikaju.weebly.com/uploads/1/3/4/3/134359408/7788041.pdfIn PDF document text
- https://tekoriforeta.weebly.com/uploads/1/3/4/6/134639422/zitikibirenaru.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4487626/normal_600063f435dc3.pdfIn PDF document text
- https://fupiloxeti.weebly.com/uploads/1/3/4/3/134380404/dosaren-gugisabijoxug-fiwov.pdfIn PDF document text
- https://vazemewezasal.weebly.com/uploads/1/3/0/7/130775722/8223482.pdfIn PDF document text
- http://wododepovu.iblogger.org/nimakivaroguxa.pdfIn PDF document text
- https://cdn.sqhk.co/ketofebem/i8jfjeQ/basic_frosting_recipe_without_powdered_sugar.pdfIn PDF document text
- http://totevev.22web.org/42920286908.pdfIn PDF document text
- https://cdn.sqhk.co/bomemenun/ciigcx9/ecto_blaster_planetside_2.pdfIn PDF document text
- https://vojutodebol.weebly.com/uploads/1/3/4/0/134096580/sebififer.pdfIn PDF document text
- https://xalifabosivibu.weebly.com/uploads/1/3/0/7/130775217/pozamu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4365542/normal_5fcbad4fd4394.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4426679/normal_5fc56c8e36364.pdfIn PDF document text
- https://nolabuxovitu.weebly.com/uploads/1/3/5/3/135305824/22451834.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://zevebetuj.epizy.com/11826220586.pdfIn PDF document text
- http://sefukapa.epizy.com/laboratory_assistant_interview_questions_and_answers.pdfIn PDF document text
- http://watuginidimefil.epizy.com/sia_chandelier_song_free.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_off00019cff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19CFF	5512 bytes
SHA-256: `7f7bc747857c9e2790895ab7862fd1cb16f3097a577b16e41d4ab74f8da62de9`
`font_01_sfnt_off0001af99.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1AF99	15320 bytes
SHA-256: `b992bee5c55a2ebd1e1a56229faad0a5453a4daf4dc27e962d61a709db7d5625`
`font_02_sfnt_off0001df94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1DF94	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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