PDF malware analysis — malicious · a197bbcb9e2b209b

MALICIOUS

PDF

79.6 KB Created: 2021-09-17 01:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: ef22bb312e3e169f3620e922d378c7d7 SHA-1: 95ad4db88bedeecc76bde705c63865001ca85080 SHA-256: a197bbcb9e2b209b44e2bb3f16145543aa09eb763e77cb0b7ca541487294a78f

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm, a common tactic for phishing or distributing further malware. The heuristic 'SE_QR_LURE' suggests the document may instruct users to scan a QR code, further supporting a phishing or redirection-based attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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 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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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/uplcv?utm_term=where+can+i+find+the+qr+code+on+my+iphone PDF link annotation
- http://ymmicro.com/files/files/87691695274.pdfIn PDF document text
- https://protrialse.eu/files/files/wurovovozakifobezi.pdfIn PDF document text
- http://socukorglutamatmentesfuszer.hu/ckfinder/userfiles/files/nafakuzisotipenozalon.pdfIn PDF document text
- https://francoisdaulte.com/ckfinder/userfiles/files/sukimagedefovinokesaka.pdfIn PDF document text
- http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b67c2a06fa---rexifapexoz.pdfIn PDF document text
- http://kleiberit.ru/files/file/disuwomumezemisosuno.pdfIn PDF document text
- http://weiddy.com/uploads/files/202109170506572143.pdfIn PDF document text
- http://alconsprom.ru/ckfinder/userfiles/files/82100735428.pdfIn PDF document text
- http://artospace.com/pics/file/61239552680.pdfIn PDF document text
- http://stressmanagement-karriere.de/userfiles/file/jodasenibe.pdfIn PDF document text
- http://metalzilembo.it/userfiles/files/12749433049.pdfIn PDF document text
- http://makinsushi.com/uploads/files/12207761989.pdfIn PDF document text
- https://3eyamaichi.com/upload/ckfinder_temp/files/20210912194903.pdfIn PDF document text
- https://transilvaniafishing.ro/app/webroot/files/userfiles/files/98905312661.pdfIn PDF document text
- http://buyyoutubelikes.com/ci/userfiles/files/50367407957.pdfIn PDF document text
- https://agroadvanced.com/app/webroot/newsletters/editor/files/fegofo.pdfIn PDF document text
- http://888chji.com/userfiles/files/78208866181.pdfIn PDF document text
- http://szyqjsj.com/UploadFile/file/20210914095036392.pdfIn PDF document text
- http://99hospitalitygroup.com/ckfinder/userfiles/files/waxetoxixawejo.pdfIn PDF document text
- https://rowadalbyt.com/userfiles/files/fakosa.pdfIn PDF document text
- http://vipforiraq.com/userfiles/files/valet.pdfIn PDF document text
- http://tortsurprise.ru/upload/redactor/files/57536365171.pdfIn PDF document text
- http://peterpan1996.it/userfiles/files/61143912359.pdfIn PDF document text
- http://everintelconsulting.com/upload/file/202109081916468824.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d1c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1C1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e9d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9D8	10924 bytes
SHA-256: `5a6f472fb0b870e804c2b07ed06ac32e763b69b484ed8a4405d2d3adff4b0fda`
`font_02_sfnt_off000102c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102C2	17656 bytes
SHA-256: `c717d68a4623cea43ed00b3fcad5dd12dc60fd30fdb8fd0cd16368fb08cc737d`

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