Malicious PDF — malware analysis report

Static analysis result for SHA-256 d540d5c5315d54dc…

MALICIOUS

PDF

57.5 KB Created: 2020-03-21 14:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c59e398041b6e1f815b1b6ab214e87da SHA-1: ce773cd054159ec1b4349ed7f05bdb66896c1790 SHA-256: d540d5c5315d54dc9992554fe9b2c80fcfc7f1043a0a03d1be31b6cc61c21517
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, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though partially corrupted, contains references to URLs that are likely part of a link farm or redirection scheme. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://nationalfootballcheerleadersalumni.org/uploads/1/3/1/1/131164211/131164211.html#formula+de+densidad+del+flujo+magnetico
    • http://priorityrecruitingsolutions.com/uploads/1/3/0/7/130776730/ronuz.pdf
    • http://sundancecafenederland.com/uploads/1/3/0/4/130476320/pitirumudewawew.pdf
    • http://www.promptservicesllp.com/uploads/1/3/0/6/130639105/5887047.pdf
    • http://ncplbasketball.org/uploads/1/3/0/5/130544625/2720074.pdf
    • http://www.apogeeservicesllc.com/uploads/1/3/0/4/130435821/9fc0f930a.pdf
    • http://libertyparty.us/uploads/1/3/0/7/130775274/banapuzubigija_tigujom.pdf
    • http://queenalexandra78ave.com/uploads/1/3/0/2/130272613/baba2f1ac3b1.pdf
    • http://sophisticatedsub.com/uploads/1/3/0/7/130775961/2119039.pdf
    • http://radonmitigationminneapolis.com/uploads/1/3/0/9/130969166/dudenafatolasi_dewovegivube.pdf
    • http://dicerbomorgan.com/uploads/1/3/0/7/130775189/nupizekinukapiz-wodigolusoke-wavubetos-zerakabetem.pdf
    • http://vivavocestyling.com/uploads/1/3/0/2/130288392/1878981.pdf
    • http://thechrischapman.com/uploads/1/3/0/4/130435588/godixowexoxuzamovi.pdf
    • http://pocketcompost.com/uploads/1/3/0/3/130323659/b65aa5ee.pdf
    • http://1988ltb.com/uploads/1/3/0/6/130605442/455851.pdf
    • http://stbfaithformation.com/uploads/1/3/0/5/130588607/luvakijenugu.pdf
    • http://rebontheweb.com/uploads/1/3/0/6/130621819/6935417.pdf
    • http://shelleyrichardson.net/uploads/1/3/0/7/130740206/diziketa.pdf
    • http://ancientcraftbarbershop.com/uploads/1/3/0/5/130590380/dafibudowofafabazofi.pdf
    • http://geomote-systems.com/uploads/1/3/0/6/130621455/pokoname_rugikiro_wafeluse.pdf
    • http://www.shadonnajordan.com/uploads/1/3/0/5/130546209/karepularuvakerep.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007684.bin
d005337301cd779ef15ff921095e7ccfecd4d76ba0e4f46296ae53164aeb6358		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7684 6532 bytes
font_01_sfnt_off00008688.bin
42888625a37b3b8dff7c6d4c771cb3936b8df5b0f7815bc1f94d0aa119381f24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8688 9376 bytes
font_02_sfnt_off0000a84f.bin
e39f30135eccb9727985edb19f002f6cd14d9554c95e6543f9eea8cf46e4bfae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA84F 2988 bytes
font_03_sfnt_off0000b2e9.bin
8ce8d29787feb00ca5186ad9be688f873c1a1f240be5171ef63aa817ab5ddf81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E9 3296 bytes
font_04_sfnt_off0000bf72.bin
dff9d59c7ace60fe4248a64a856848866bb3c45eb06a62bbddb4519962881f2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF72 16160 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.