Malicious PDF — malware analysis report

Static analysis result for SHA-256 c330d3dbfad56e22…

MALICIOUS

PDF

87.4 KB Created: 2021-04-15 18:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22f763a96d1248c6d7b3a42707878248 SHA-1: 8d82bf3933a694b34c12a0923da6c30b2b445fa6 SHA-256: c330d3dbfad56e2228a2949f7b822a37df644f46d8c3899f14fd55deb12bcdf0
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious and phishing-related. It contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be a lure for a tutorial, likely to entice users to click. The presence of external URIs and link farm characteristics further supports a malicious intent, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=how+to+make+a+wordpress+website+-+divi+theme+tutorial
    • https://cdn.sqhk.co/kixobaza/wLihFih/negilan.pdf
    • http://fullhp.info/wofenatidatesexexuzezmziyz.pdf
    • http://vazawujuzu.sportsontheweb.net/sefeletopezemuxazitowu.pdf
    • http://zujugowez.iblogger.org/sony_mdr-rf985rk_rf_wireless_headphones.pdf
    • http://zonitupupafof.sportsontheweb.net/fukupobutuwiwofosib.pdf
    • https://cdn.sqhk.co/bobavijiwoba/hhj5j17/pukexirikirewin.pdf
    • https://cdn.sqhk.co/wubumeze/CBhidnk/wafol.pdf
    • https://cdn.sqhk.co/wakivugex/AuifjcP/superhero_shahenshah_bhai_ringtone_download.pdf
    • http://blacklaser.ru/zofurezo3sms4.pdf
    • https://cdn.sqhk.co/tomubozes/jJhihgG/battlehand_heroes_guide.pdf
    • http://goginexoze.22web.org/why_dont_they_close_doors_in_movies.pdf
    • http://winoraama.website/flickr_api_key_examplew2cxd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gikuxoxabak.epizy.com/73421231239.pdf
    • http://takumoz.epizy.com/cassandra_vs_mongodb.pdf
    • http://xajetizefo.rf.gd/workplace_safety_topics.pdf
    • http://ruwozubusa.epizy.com/42353281039.pdf
    • http://bopefurolo.rf.gd/29834765995.pdf
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efd1.bin
66ebc6f7fa7a89ab585a8e0e3b861fc957159c273cdef130b940927d92cf6240		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD1 5548 bytes
font_01_sfnt_off00010293.bin
8c7b4c61d9ff80457b07a0c114df0d77ac9d423a71cb022d3848e8498400da84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 10856 bytes
font_02_sfnt_off000127f8.bin
74ae3a0069e24b7e213835a74a194c8bc27454833213f55499a587658793d3c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127F8 16196 bytes
font_03_sfnt_off00013d35.bin
07ae1edcb5b54621a0ea118720c84f3ad93ca2b406f392172fb203e84e436f22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D35 6424 bytes

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