PDF malware analysis — malicious · 31989e97f6f15cdf

MALICIOUS

PDF

84.4 KB Created: 2021-03-16 20:53:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20

MD5: 067e76922cb27d5c253df8a9a8782dcb SHA-1: db26fae7ce87112cc5abe46c36bc84a619a44481 SHA-256: 31989e97f6f15cdfc44058e078ed03d245a8d39d52361b17dfeba7e153a0bccb

226 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a large number of external links, many hosted on disposable domains, suggesting an attempt to redirect users to potentially harmful content. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates a pattern of mimicking financial transaction changes, a common tactic in business email compromise attacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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.
Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE

Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://xajibur.ru/wix?keyword=hotspot+shield+free+vpn+proxy+apk+uptodown PDF link annotation
- http://nawitebexu.medianewsonline.com/nugomegaxazezas.pdfIn PDF document text
- https://jowesezowu.weebly.com/uploads/1/3/4/3/134366841/pezodokal-zibasonikasin.pdfIn PDF document text
- http://logvoz.ru/756925005674whub.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481831/normal_6033bab2b46ef.pdfIn PDF document text
- https://webeboxux.weebly.com/uploads/1/3/4/4/134493090/pitigigu_goxijepef_pupatavuta.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4392210/normal_5fe58dc5e7453.pdfIn PDF document text
- https://nedosadowizo.weebly.com/uploads/1/3/5/3/135347652/kuxevilopu-durisasa.pdfIn PDF document text
- http://lavkavkusa.store/gasusodopebemelaredibalaqoy3f.pdfIn PDF document text
- https://cdn.sqhk.co/fozuwasixeja/fehdnhh/ice_cream_shop_open_24_hours_in_chennai.pdfIn PDF document text
- https://kiwemedorupa.weebly.com/uploads/1/3/4/4/134446537/varafosugu_kajenibo_tajidifex_xawizupilojoza.pdfIn PDF document text
- http://canonsburglake.org/what_do_different_color_rubber_bracelets_meanuhcyj.pdfIn PDF document text
- https://ribofefafuf.weebly.com/uploads/1/3/4/7/134770843/dizusepawilovidez.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376372/normal_602417f5a65ec.pdfIn PDF document text
- https://cdn.sqhk.co/madagijoj/jhgihDj/yellow_color_wallpaper_for_android.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490534/normal_6030ea45223b0.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://nakeviw.myartsonline.com/salicylic_acid_cleanser_fragrance_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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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
`stream_004_off00011827.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x11827	24164 bytes
SHA-256: `173e3599d0ec737882e08f59b0a9d741082e8e744439a974d07db667a8fd11cc`
`font_00_sfnt_off0000dd07.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD07	5476 bytes
SHA-256: `ab515c642e24297d74223e988fefcd8d368179d95f931e027974bf24b8d4dfe0`
`font_01_sfnt_off0000efba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFBA	11744 bytes
SHA-256: `4e3d0b14e1a6348453ee0ec8e4973414fd1ae6177b05cdde8e747c3ba8049d76`

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