Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e25cc51198e7504…

MALICIOUS

PDF

85.7 KB Created: 2021-09-09 04:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 71a75acd31c504f70db4d6cf5bd6dbe1 SHA-1: 872238395ef3ca02c51055b203ae4abceae97fcb SHA-256: 9e25cc51198e75041e48eded405a98886f001b3f35a65e096aa21c9e74701a2d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains a large number of embedded links, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of 'utm_term=iphone+xs+max+price+in+bd' in one of the URLs indicates a potential attempt to lure users interested in mobile device pricing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 5

  • 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.
  • 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://pre-www.bridge-college.com/uploaded/ckeditor/files/tawotafejakuwir.pdf In PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/suvozot.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/janemazizomab.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/gejasefakujujepopiwazasa.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/62747204323.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/43627124322.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16135cc44d4034---59014497860.pdfIn PDF document text
    • http://mamam.by/upload/File/file/83407598984.pdfIn PDF document text
    • http://pataibicaj.hu/userfiles/file/75047235090.pdfIn PDF document text
    • https://fontan-montag.ru/img/upload/vajezediwuguduxegu.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/22561012908.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/34384366006.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/dujesadegobelazam.pdfIn PDF document text
    • https://zoldlaptop.hu/ckfinder/userfiles/files/bozifajutosimi.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/lenavuwolekodelujat.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/takorozedelakufi.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/vodetupupo.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/komiragurijukabo.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/33895142698.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/mutagetowuvadaxagukujena.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/66885192834.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/puxakarolip.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/sovupopusukuru.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/1364692693.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///fonebesadubuximuponu.pdfIn PDF document text
    • http://poledance-chrudim.cz/files/file/wiromakapoligab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=iphone+xs+max+price+in+bdPDF 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.

FilenameKindSourceSize
font_00_sfnt_off0000e318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE318 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2F 10828 bytes
SHA-256: d5fc7918f418684eaa6135e2ffd615b845ad4501c7dab99907563e6ae862ad95
font_02_sfnt_off000113b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B2 20408 bytes
SHA-256: fbdccf55927dba66588e3fde55a36a9366c01137648221bee051447d1fd7eaed