Malicious PDF — malware analysis report

Static analysis result for SHA-256 553785321e0ccb41…

MALICIOUS

PDF

18.4 KB Created: 2019-05-01 18:34:56 +01:00 Authoring application: mPDF 5.7
MD5: d1be69821b0d52ad4a26cfe9e243f9df SHA-1: 4b89e2be488af157ca46261012c8fee095ff86b5 SHA-256: 553785321e0ccb41b01e63c1aa395a70b3b198888e346a35385c0ade82722eb3
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: User Execution: Malicious File

The PDF contains a large number of embedded URLs, identified as a link farm. The ML classifier also flagged this PDF as malicious. While the specific URLs extracted are currently marked as benign, the sheer volume and structure suggest an attempt to manipulate search engine results or distribute potentially harmful content. No scripts were extracted, limiting further analysis of the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

Heuristics 2

  • 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.
  • 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 http://loaminoo.linkpc.net/4099090094096097/Killer-Christmas-An-Emma-Wild-Holiday-Mystery-1-by-Harper-Lin.pdf
    • http://loaminoo.linkpc.net/3098093096090095/Christmas-Awakening-A-Holiday-Mystery-at-Jenkins-Cove-Harlequin-Intrigue-1095-by-Ann-Voss-Peterson.pdf
    • http://loaminoo.linkpc.net/3097094095097098/Wild-Holiday-Nights-Holiday-Rush-Playing-Games-All-Night-Long-by-Samantha-Hunter.pdf
    • http://loaminoo.linkpc.net/7095095097097094/A-Harper-Christmas-Sloane-Harper-2-5-by-Astrid-Arditi.pdf
    • http://loaminoo.linkpc.net/5092093096095094/Ghostly-Images-A-Harper-Harlow-Mystery-5-by-Lily-Harper-Hart.pdf
    • http://loaminoo.linkpc.net/2098091092094097/Texas-K-9-Unit-Christmas-Holiday-Hero-Rescuing-Christmas-by-Shirlee-McCoy.pdf
    • http://loaminoo.linkpc.net/8098097098094/Risky-Christmas-Holiday-Secrets-Kidnapped-at-Christmas-by-Jill-Sorenson.pdf
    • http://loaminoo.linkpc.net/4098090097094092/This-Holiday-Magic-A-Gift-from-the-Heart-Mine-by-Christmas-A-Family-for-Christmas-by-Celeste-O-Norfleet.pdf
    • http://loaminoo.linkpc.net/5090090091096097/I-ll-Be-Home-for-Christmas-Silver-Bells-On-a-Snowy-Christmas-The-Perfect-Holiday-by-Debbie-Macomber.pdf
    • http://loaminoo.linkpc.net/1091094092090095097/A-Heartwarming-Christmas-A-Boxed-Set-of-Twelve-Sweet-Holiday-Romances-Christmas-Town-Maine-2-5-by-Melinda-Curtis.pdf
    • http://loaminoo.linkpc.net/6098092097090/Wild-Temptation-Wild-1-by-Emma-Hart.pdf
    • http://loaminoo.linkpc.net/4095092097099097/Wild-Addiction-Wild-2-by-Emma-Hart.pdf
    • http://loaminoo.linkpc.net/7090095099099/Killer-Stalker-0-5-by-Clarissa-Wild.pdf
    • http://loaminoo.linkpc.net/3094095094091094/Killer-Stalker-0-5-by-Clarissa-Wild.pdf
    • http://loaminoo.linkpc.net/1093099097092099/Christmas-Holiday-by-W-Somerset-Maugham.pdf
    • http://loaminoo.linkpc.net/2094091091098098/Father-Christmas-Goes-on-Holiday-by-Raymond-Briggs.pdf
    • http://loaminoo.linkpc.net/3091097/Wild-Reckless-Harper-Boys-1-by-Ginger-Scott.pdf
    • http://loaminoo.linkpc.net/4096094090098097/All-He-Wants-For-Christmas-Eve-An-Erotic-Holiday-Story-by-Ruby-Carew.pdf
    • http://loaminoo.linkpc.net/4092095093090094/Trapped-with-Twins-for-Christmas-A-Holiday-MFM-Quickie-by-Kat-Crimson.pdf
    • http://loaminoo.linkpc.net/1095091097091097/The-Christmas-Present-An-Erotic-Holiday-Story-by-Victoria-Primrose.pdf
    • http://loaminoo.linkpc.net/5090090091096097/I-ll-Be-Home-for-Christmas-Silver-Bells-On-a-Snowy-Christmas-The-Perfect-Holiday-by-Debbie