Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b80d622b83ef6a7…

MALICIOUS

PDF

69.9 KB Created: 2021-09-28 10:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 322746c23ddab854d8041d8e29d0ffd1 SHA-1: 9a13be95fc355bc94493e847914f053a2efc5f64 SHA-256: 9b80d622b83ef6a73aefae4512deab5c36a3754b7e4194d08783c36722ef319d
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the user is prompted to call a phone number. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://ccichn.vn/data/upload/file/49999800062.pdf
    • https://listapp.in/ci/userfiles/files/surop.pdf
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dezuluxinisetemipivavewol.pdf
    • https://takarasushimn.com/userfiles/files/jowoxemotamarizesisamujof.pdf
    • https://maftplayer.net/calisma2/files/uploads/jutamozejadudatufume.pdf
    • http://www.blueoak.fr/image/file/lomuluzore.pdf
    • https://lacaune.hu/userfiles/file/14872012603.pdf
    • http://krukewittfarms.com/userfiles/file/jinanafiroxuzakomobazumo.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/4tjt30gu0spsgslb7b2fhcp1j0/wovusesatoxogaronizod.pdf
    • http://hotelborgodeipoeti.com/userfiles/files/tuvomusadujirup.pdf
    • http://vivaldiskibus.com/FileData/ckfinder/files/20210921_5A17456D2C2F87B0.pdf
    • http://rebizplus.com/userfiles/file/xunudesamutom.pdf
    • http://deauville.ru/files/file/57743286703.pdf
    • http://mascotdd.com/file_media/file_image/file/ralamoxuwerinefasaj.pdf
    • http://grimastone.ru/files/44281085802.pdf
    • http://chieucoingason.vn/files/bisujebabomapolozunazu.pdf
    • http://nhakhoauytinhaiphong.com/upload/files/358557340.pdf
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/78867706540.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614faad0de3f5---74560435487.pdf
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/65673347989.pdf
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/bozawadalala.pdf
    • http://pxmonastery.org/CKEdit/upload/files/8430328109.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=tamil+online+watch+movie+site
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b062.bin
18fe02ac49bf7bb9463d8f1de7628154054bff9c09a7c42036bb58a6b1cf8899		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB062 16400 bytes
font_01_sfnt_off0000da2a.bin
d51743dfd2e385b941725667daf4791af942aeca64183487a01cbc4ba4e66fbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2A 10512 bytes
font_02_sfnt_off0000f1f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F9 16792 bytes

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