Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76680d221766171…

MALICIOUS

PDF

75.1 KB Created: 2021-04-03 01:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 968266abeef40149b0097af8fdeecebf SHA-1: 83d52ace269983b688a932f7dbec01978c180409 SHA-256: d76680d221766171099c6544a14e4085f54f3360e2fdd0125bf63f778cd9edcf
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malicious link farm. It contains numerous external links, including one to 'nipisod.ru', suggesting an attempt to redirect users to potentially harmful content. The document body, though partially corrupted, contains keywords related to 'hacked arcade games', likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/wix?keyword=hacked+arcade+games+unblocked+at+school
    • https://cdn.sqhk.co/wabasenenem/diapBhf/897512472.pdf
    • https://cdn.sqhk.co/matikefateri/jbFiehi/zombie_shooter_zombie_hunter_mod_apk.pdf
    • http://generatorsale.ru/55817959383km2ds.pdf
    • https://static.s123-cdn-static.com/uploads/4443576/normal_5ff16c8702f75.pdf
    • http://generalmassage.online/18256014775pepnn.pdf
    • https://cdn-cms.f-static.net/uploads/4501214/normal_6055b90094518.pdf
    • https://cdn-cms.f-static.net/uploads/4456165/normal_60508fd43136d.pdf
    • https://logesili.weebly.com/uploads/1/3/5/3/135389335/f31925518c.pdf
    • https://cdn.sqhk.co/libegavezu/ieB3Khc/jolebibemodugosaze.pdf
    • https://cdn.sqhk.co/pijajawopoji/EidwjfS/infinity_stones_movies_in_order.pdf
    • https://cdn.sqhk.co/bafiweba/LnANTjb/bbc_football_live_scores_carabao_cup.pdf
    • https://cdn.sqhk.co/zinumazak/GPnifhg/likert_scale_format.pdf
    • https://cdn-cms.f-static.net/uploads/4470537/normal_6064d459424b9.pdf
    • http://fabulouss.space/supibutevalakbjem9.pdf
    • https://bokasopuvozanib.weebly.com/uploads/1/3/4/3/134319525/bobudodaj.pdf
    • https://cdn.sqhk.co/ragebobeb/hgdNiiW/feud_meaning_in_tamil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/woxorojero/bitbucket_single_file.pdf
    • https://s3.amazonaws.com/povelenavuviw/mesupekomatilebirabur.pdf
    • https://s3.amazonaws.com/pajeriramal/sanyo_pro_xtrax_multiverse_projector_lamp_hours.pdf
    • https://s3.amazonaws.com/gagotaniwipure/38070087901.pdf
    • https://s3.amazonaws.com/sevoga/jexegepibufoxoriliwib.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_off0000e88b.bin
1368acfb1a53d1582775e9af0b5665826acf426c6df1cbbcde54ea37fd97b63b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE88B 5516 bytes
font_01_sfnt_off0000fb17.bin
79f64203ee9156d328b8e28bd27370fb9aef527df79b76f1396dce9b0b4cdb07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 10540 bytes

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