Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b56988a01a5dfff…

MALICIOUS

PDF

13.0 KB Created: 2019-05-01 13:51:23 +01:00 Authoring application: mPDF 5.7
MD5: b357a0aed1d3cfed285dfefaadc4a85c SHA-1: 00d8aa68ff06e15c3fa5d2e766fd984f168bebcf SHA-256: 4b56988a01a5dfff6dcdc3e2fbb09ac5adf223ae7b84e3753db0c6e1e1cfc73f
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged by an ML classifier as malicious and contains a large number of embedded external links. The heuristic 'PDF_SEO_LINK_FARM' indicates these links are likely part of a scheme to manipulate search engine results or redirect users to potentially harmful content. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9006

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/3097090093097091/Saving-the-Fish-from-Drowning-Reflections-from-the-Barrio-by-James-O-39-Halloran.pdf
    • http://loaminoo.linkpc.net/3099091092096092/The-Drowning-The-Drowning-1-by-Rachel-Ward.pdf
    • http://loaminoo.linkpc.net/3094097096090090/One-Fish-Two-Fish-Red-Fish-Blue-Fish-by-Dr-Seuss.pdf
    • http://loaminoo.linkpc.net/4097092096093092/Red-Fish-Dead-Fish-Fish-Out-of-Water-2-by-Amy-Lane.pdf
    • http://loaminoo.linkpc.net/1092092092096091/Gould-s-Book-of-Fish-A-Novel-in-Twelve-Fish-by-Richard-Flanagan.pdf
    • http://loaminoo.linkpc.net/1096097097091097/Gould-s-Book-of-Fish-A-Novel-in-Twelve-Fish-by-Richard-Flanagan.pdf
    • http://loaminoo.linkpc.net/1091092094097099/Saving-You-Saving-Me-You-amp-Me-Trilogy-1-by-Kailin-Gow.pdf
    • http://loaminoo.linkpc.net/2092098096099097/Saving-You-Saving-Me-You-amp-Me-Trilogy-1-by-Kailin-Gow.pdf
    • http://loaminoo.linkpc.net/9092094096092090/Saving-Forever---Part-5-Saving-Forever-5-by-Lexy-Timms.pdf
    • http://loaminoo.linkpc.net/4095090090091/Saving-Mars-Saving-Mars-1-by-Cidney-Swanson.pdf
    • http://loaminoo.linkpc.net/1097094096098/The-Drowning-by-Jack-Ehrlich.pdf
    • http://loaminoo.linkpc.net/1093091098093093/Drowning-Anna-by-Sue-Mayfield.pdf
    • http://loaminoo.linkpc.net/4097098096090096/One-Man-Drowning-by-Steph-Minns.pdf
    • http://loaminoo.linkpc.net/1097097098/The-Drowning-Game-by-L-S-Hawker.pdf
    • http://loaminoo.linkpc.net/8098094097092099/Man-Drowning-by-Henry-Kuttner.pdf
    • http://loaminoo.linkpc.net/3099098092095094/Drowning-in-Fire-by-Craig-S-Womack.pdf
    • http://loaminoo.linkpc.net/4091092093095090/The-Drowning-People-by-Richard-Mason.pdf
    • http://loaminoo.linkpc.net/5090092092097094/Drowning-Ruth-by-Christina-Schwarz.pdf
    • http://loaminoo.linkpc.net/1094090098093095/The-Drowning-Tree-by-Carol-Goodman.pdf
    • http://loaminoo.linkpc.net/3099091092098093/Drowning-Fergus-by-Addison-Lane.pdf
    • http://loaminoo.linkpc.net/1097097098/The-

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