Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9d878623ccbe53…

MALICIOUS

PDF

80.7 KB Created: 2021-03-23 23:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a100da9c4ead15de4cfa5fe99b68b4e9 SHA-1: 7d96b6a8caf2a6b66f53932305e7c714364e7339 SHA-256: 8b9d878623ccbe53df1d9df4a7747860d15a96449160eeb59175ff43d8323a08
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. An embedded URI points to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains keywords related to online games, suggesting a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/wix?keyword=pokemon+games+unblocked+scratch
    • http://motarojetox.sportsontheweb.net/medialink_router_firmware.pdf
    • https://cdn-cms.f-static.net/uploads/4464323/normal_604d35005de31.pdf
    • https://lupuxamugegudi.weebly.com/uploads/1/3/4/6/134623484/rezozolakajipe.pdf
    • https://xolufoxe.weebly.com/uploads/1/3/4/5/134501271/kokewisepijomupivebi.pdf
    • http://jijuduli.mywebcommunity.org/39789981089.pdf
    • http://foriponawu.iblogger.org/why_my_hp_monitor_keeps_going_to_sleep.pdf
    • http://vowuzemiru.medianewsonline.com/84520580015.pdf
    • https://static.s123-cdn-static.com/uploads/4451954/normal_6005c0d4ba3bd.pdf
    • http://purigoguwoz.22web.org/fairest_lord_jesus_piano_sheet.pdf
    • https://static.s123-cdn-static.com/uploads/4410206/normal_5fdeaed1cb513.pdf
    • http://tibudirowe.mygamesonline.org/begrijpend_lezen_2de_leerjaar.pdf
    • https://static.s123-cdn-static.com/uploads/4415935/normal_5fdfc8183b943.pdf
    • https://static.s123-cdn-static.com/uploads/4370764/normal_6000ea611e834.pdf
    • https://static.s123-cdn-static.com/uploads/4481052/normal_5fe4e62e9e46d.pdf
    • https://cdn-cms.f-static.net/uploads/4445889/normal_6054f791f1ee6.pdf
    • http://modozadubop.mywebcommunity.org/22133978009.pdf
    • http://jixewelo.scienceontheweb.net/visiwusuboperivepe.pdf
    • https://cdn-cms.f-static.net/uploads/4462379/normal_5fe61c4f1dd80.pdf
    • https://bedexupef.weebly.com/uploads/1/3/0/7/130775630/zofugipapirufogosane.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jabisuluro.epizy.com/55348821341.pdf
    • http://vunanazon.rf.gd/antenor_firmin.pdf
    • http://mukanebesiva.atwebpages.com/645155920.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faf0.bin
a9ce4897630ee2a125c725c297f2ac5112e35d83c1923acd2806396117c2eb28
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF0 5556 bytes
font_01_sfnt_off00010da9.bin
86e6a105f0b1ed0528ef9f646043921c9203f0ae69417fbd9580c411ba148370
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA9 11800 bytes