Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48592d2f2b047aa…

MALICIOUS

PDF

46.5 KB Created: 2020-03-28 07:03:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 13584010988b2a4b58b436c7333287eb SHA-1: e1e34f0983e4f9d05346b6ff5244bc49ebe62399 SHA-256: e48592d2f2b047aa3aa79e511ae95a1b788d241b108dd21c6a2bd193aec805f7
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML classifier also strongly indicated maliciousness. The document body contains introductory text and URLs, reinforcing the link-based lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://bulldogrestorationservices.org/uploads/1/3/0/7/130740251/130740251.html#introduccion+a+la+planeacion+de+instalaciones
    • http://restorechurchnc.net/uploads/1/3/0/3/130323937/0360abe.pdf
    • http://www.mackprobuilding.com/uploads/1/3/0/6/130640126/giresonolo.pdf
    • http://pirineusexperience.org/uploads/1/3/0/5/130588621/8856230.pdf
    • http://disclinic.net/uploads/1/3/0/6/130604306/4583168.pdf
    • http://wholelifesofttissue.com/uploads/1/3/0/6/130620865/xadavax.pdf
    • http://dogmaanimalrescue.com/uploads/1/3/0/3/130379210/galogefuko.pdf
    • http://www.complementaryreflexstudies.com/uploads/1/3/0/6/130639463/5728454.pdf
    • http://plumasrentals.com/uploads/1/3/0/6/130639032/db1486d49b9cd.pdf
    • http://www.memsandmiles.com/uploads/1/3/0/2/130288416/463214c.pdf
    • http://kurzyhs.info/uploads/1/3/0/8/130813609/9435659.pdf
    • http://www.littleredcravatfoods.com/uploads/1/3/0/7/130739347/2adb1374.pdf
    • http://www.centerforembodiement.com/uploads/1/3/0/4/130483710/2154334.pdf
    • http://amuct.com/uploads/1/3/0/6/130604078/2804578.pdf
    • http://neighborhoodpage.com/uploads/1/3/0/4/130489052/jetojugugesek.pdf
    • http://chefliuhouston.com/uploads/1/3/0/5/130542870/goxiripajex_favunujeba_lexokegutuxero.pdf
    • http://kamconsulting.fr/uploads/1/3/0/7/130775897/5727826.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b6b.bin
5bc74c821d51a8b4608eeed37bd6da5a7527e42e51e876c9a1427733044147c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6B 8876 bytes
font_01_sfnt_off00008bbe.bin
87fd6b1a35a64f5c2d30902eea89631a9c05d6b36ef70c6d0cee4d2ad867525e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBE 2596 bytes
font_02_sfnt_off000094dc.bin
6ce32c7926c6f21db5640dc1790b79ec78d1dba01d796f7b775dba7caf5b1ad9
pdf-font-stream PDF embedded font (sfnt) at offset 0x94DC 16076 bytes