Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e5e33940f04194…

MALICIOUS

PDF

21.7 KB Created: 2019-04-30 08:47:29 +01:00 Authoring application: mPDF 5.7
MD5: 127ea22da0f148b6e54aa7155419b2d5 SHA-1: 0a2f3bfa13f1451eab9aec95034bd7bb686bc05d SHA-256: 43e5e33940f04194400d58f6e58c2d55df4e64c3e01fb22453bf1adebd008246
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded URLs, identified as a link farm. The ML classifier strongly suggests maliciousness. While the URLs themselves are currently classified as benign, the sheer volume and the heuristic firing indicate a likely attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/1091094091090092092/The-Cowgirl-Aunt-of-Harriet-Bean-Harriet-Bean-3-by-Alexander-McCall-Smith.pdf
    • http://loaminoo.linkpc.net/1091094091090091097/The-Five-Lost-Aunts-of-Harriet-Bean-Harriet-Bean-1-by-Alexander-McCall-Smith.pdf
    • http://loaminoo.linkpc.net/7097097095096092/Muppet---Illustrated-Characters-Abbot-Alice-Andy-the-Armadillo-Anson-Anderson-Arabs-Ariel-Aunt-Agnes-Snuffleupagus-Aunt-Edna-Aunt-Sue-Baby-Monster-Babyface-Magee-Bean-Bunny-Becca-Bird-Big-Boy-Bigfoot-Billy-Bird-Buddy-Bird-Cabbages-Calvi-by-Source-Wikia.pdf
    • http://loaminoo.linkpc.net/2095091093091092/Ivy-and-Bean-Super-special-Collection-Books-1-8-Ivy-Bean-by-Annie-Barrows.pdf
    • http://loaminoo.linkpc.net/5096096091097/Ivy-and-Bean-Break-the-Fossil-Record-Ivy-and-Bean-3-by-Annie-Barrows.pdf
    • http://loaminoo.linkpc.net/6093099090095/Ivy-and-Bean-Doomed-to-Dance-Ivy-and-Bean-6-by-Annie-Barrows.pdf
    • http://loaminoo.linkpc.net/1091094090099098095/Bean-Takes-a-Walk-Bean-in-the-Garden-1-by-Ann-Bevans.pdf
    • http://loaminoo.linkpc.net/1091094090098097090/Bean-By-Bean-A-Cookbook-by-Crescent-Dragonwagon.pdf
    • http://loaminoo.linkpc.net/6090093099099090/Ivy-and-Bean-Take-the-Case-Ivy-and-Bean-10-by-Annie-Barrows.pdf
    • http://loaminoo.linkpc.net/4092099091090/Ivy-and-Bean-and-the-Ghost-That-Had-to-Go-Ivy-and-Bean-2-by-Annie-Barrows.pdf
    • http://loaminoo.linkpc.net/1091096090096093091/A-Work-of-Beauty-Alexander-McCall-Smith-s-Edinburgh-by-Alexander-McCall-Smith.pdf
    • http://loaminoo.linkpc.net/7098094098095094/Harriet-the-Spy-Harriet-the-Spy-1-by-Louise-Fitzhugh.pdf
    • http://loaminoo.linkpc.net/3091090097090096/Bean-by-Bean-A-Cookbook-More-Than-175-Recipes-for-Fresh-Beans-Dried-Beans-Cool-Beans-Hot-Beans-Savory-Beans-Even-Sweet-Beans-by-Crescent-Dragonwagon.pdf
    • http://loaminoo.linkpc.net/6091099099090096/Uncle-Tom-s-Cabin-Or-Life-Among-the-Lowly-1852-by-Harriet-Beecher-Stowe-The-REV-James-Sherman-21-February-1796---15-February-1862-Was-an-English-Congregationalist-Minister-by-Harriet-Beecher-Stowe.pdf
    • http://loaminoo.linkpc.net/3093091095094092/One-City-by-Alexander-McCall-Smith.pdf
    • http://loaminoo.linkpc.net/3093094097096098/Tears-of-the-Giraffe-by-Alexander-McCall-Smith.pdf
    • http://loaminoo.linkpc.net/7093098093098096/The-Joke-Machine-by-Alexander-McCall-Smith.pdf
    • http://loaminoo.linkpc.net/7090094090092092/Les-larmes-de-la-girafe-2-by-Alexander-McCall-Smith.pdf
    • http://loaminoo.linkpc.net/6098090098097090/Akimbo-and-the-Elephants-by-Alexander-McCall-Smith.pdf
    • http://loaminoo.linkpc.net/7099097091091092/Amori-in-viaggio-by-Alexander-McCall-Smith.pdf
    • http://loaminoo.linkpc.net/1091094

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