PDF malware analysis — malicious · 41dd865ba4d3e0ea

MALICIOUS

PDF

69.8 KB Created: 2021-10-02 23:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: 78d590942db2fbbae61f25f5b94c393d SHA-1: 7f3bb8b2dae35cdd6233da127bc1e6bea6fb2e04 SHA-256: 41dd865ba4d3e0ea0fcd8b90d07bc0ccb0490006b2ac0de97853f6dee3b94da3

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate it functions as a link farm and contains a callback lure, prompting users to call a number for a fraudulent reason. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to direct users to malicious websites or initiate fraudulent phone calls.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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://catamma.ru/uplcv?utm_term=to+douse+meaning PDF link annotation
- http://maturitni-ples.eu/UserFiles/File/82064958556.pdfIn PDF document text
- http://www.gdchgs.com/admin/img/files/23193264252.pdfIn PDF document text
- https://semangkamerah.com/contents/files/xikezar.pdfIn PDF document text
- http://shepardinteriordesign.com/rw/upload/file/55696750574.pdfIn PDF document text
- https://kimcert.org/E/file/13925378582.pdfIn PDF document text
- http://maytinhtuyenquang.com/home/maytinhtuy/domains/maytinhtuyenquang.com/public_html/images/file/1305637788.pdfIn PDF document text
- http://sarljarry.fr/userfiles/file/45613663910.pdfIn PDF document text
- https://branpc.in/ckfinder/userfiles/files/seruz.pdfIn PDF document text
- http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d36fd97955---34547558087.pdfIn PDF document text
- http://xn--elementy-zczne-kwb98g.pl/media/file/dewago.pdfIn PDF document text
- https://www.aillant-sur-tholon.com/ckfinder/userfiles/files/xewotal.pdfIn PDF document text
- http://gruaszarate.com/ckfinder/userfiles/files/rolepidi.pdfIn PDF document text
- http://mayjack.com/upload/files/kozigupebuja.pdfIn PDF document text
- http://satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/91395094664.pdfIn PDF document text
- https://ferado.vn/userfiles/file/87623597176.pdfIn PDF document text
- http://chickendaylacrescenta.com/uploads/files/wunadapozoxogojiposu.pdfIn PDF document text
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615186d0c9cf2---24669597759.pdfIn PDF document text
- http://yanartekstil.com/firma/files/95192275007.pdfIn PDF document text
- https://takipcisec.com/calisma2/files/uploads/jugologugudogeku.pdfIn PDF document text
- http://www.smpnuenen.nl/images/files/delokikem.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/rufijilu.pdfIn PDF document text
- http://immobilieninvestors.com/userfiles/file/24245141704.pdfIn PDF document text
- http://secureyun.cn/uploadfile/file///2021100122531051.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_off0000aebb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAEBB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c6cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6CD	17184 bytes
SHA-256: `7cdd5ec10e7028f85b7dd93bf288a36286ce94d9d0ac0329474ae26a20c40aa3`
`font_02_sfnt_off0000f29a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF29A	10408 bytes
SHA-256: `ba0ad5bd3a977dbb30be1422d2554c2587aec5924283a7b3b90b21ecfc79dd7f`

Open this report in the interactive analyzer, or submit your own file for analysis.