PDF malware analysis — malicious · 5920525df3b118da

MALICIOUS

PDF

81.1 KB Created: 2021-09-21 07:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 0947a08b920492fd71738c9a37d29012 SHA-1: 1f8a4ef7d8b94d888148abf7dc5eacec9042e4dc SHA-256: 5920525df3b118dab15f83f52e350e57a0214e9eba667aa7d723e78e81f742fc

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs, even if some are benign, supports the attack pattern of directing users to external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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 http://isotope3.pm-ural.com/uploads/files/gulosoto.pdf In PDF document text
- https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614118e33c4bb---16975664813.pdfIn PDF document text
- http://wohingltd.com/userfiles/dukexo.pdfIn PDF document text
- http://krr-nfe.com/suratnfe/UserFiles/File/47788568733.pdfIn PDF document text
- https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/7282521178.pdfIn PDF document text
- http://spalovnachemolak.sk/userfiles/file/75380946909.pdfIn PDF document text
- https://studyhalltracker.com/files/file/luwogukekefepikotesa.pdfIn PDF document text
- http://emailchopper.rockeit.com/userfiles/file/tulojovi.pdfIn PDF document text
- http://szintai.hu/ckfinder/userfiles/files/tegabesugimedeneti.pdfIn PDF document text
- http://kliknetezde.cz/admin/obrazky/file/gigomuzedisaxaziti.pdfIn PDF document text
- https://delphin-restaurant.com/ckfinder/upload/files/kevafi.pdfIn PDF document text
- http://www.southpointinstitutehowrah.com/admin/uploads/file/pasikogezisigekonepa.pdfIn PDF document text
- http://iiiemjobs.com/FCK_Editor_Images/files/28394786187.pdfIn PDF document text
- https://el-tall.pl/pics/file/91898734910.pdfIn PDF document text
- http://hocomesun.com/upload/wejosoxupas.pdfIn PDF document text
- http://gespk.com/userfiles/file/dosupegeku.pdfIn PDF document text
- http://lokalizacja-gps.pl/userfiles/file/susudasukofuxudapalet.pdfIn PDF document text
- http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/bavatitawego.pdfIn PDF document text
- https://needletherapy.eu/upload/file/libijatibisotejonuva.pdfIn PDF document text
- http://hondasushi.com/uploads/files/zulomedex.pdfIn PDF document text
- https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/3a29e199be8f8d687ce964a2f2682374/lexibukulivijunadeluvi.pdfIn PDF document text
- https://xn--80ag1a2a.xn--p1ai/files/file/lagisipodafedun.pdfIn PDF document text
- https://sharedsynergy.com/userfiles/file/56855778526.pdfIn PDF document text
- http://immodraft.de/images/architekten_agentur_images_/file/64937635461.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=download+temp+mail+mod+apkPDF link annotation
- 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_off0000d4f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4F9	19652 bytes
SHA-256: `83874b84fdeda2cb9077ffd178f63657b560f15a6a31e2f262dcf33848cc13dc`
`font_01_sfnt_off000106ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106EE	10464 bytes
SHA-256: `7d4edb480743140b7db8970bca0bb146cc958a3b3ea586089de41696c195902c`
`font_02_sfnt_off00011ea6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11EA6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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