Malicious PDF — malware analysis report

Static analysis result for SHA-256 7571dd6b6572de9b…

MALICIOUS

PDF

33.6 KB Created: 2020-03-16 12:27:42 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e59316b6abc4089d21fc9e1534b7ac7d SHA-1: 29b374c588bb0447a31377f6c052c131520f8851 SHA-256: 7571dd6b6572de9b5e953a5e743b42911c5284fe3ba46beb3e3971c04075b042
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many of which point to other PDF files hosted on similar domains. The document body, though partially corrupted, includes a URL that appears to be a lure for 'funny cats and dogs videos'. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent behind the link distribution.

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://iotaphilambdanorfolk.gammaxiques.org/uploads/1/3/0/6/130620846/130620846.html#funny+cats+and+dogs+videos
    • http://theowlpublishing.com/uploads/1/3/0/6/130621179/a9718c.pdf
    • http://o7ngg.bpmtc.com/uploads/1/3/0/4/130488227/9312087.pdf
    • http://ellosningar.se/uploads/1/3/0/4/130488831/rixeva.pdf
    • http://store.lifeissowgood.com/uploads/1/3/0/7/130776817/2310048.pdf
    • http://elisanliving.com/uploads/1/3/0/6/130604515/libap.pdf
    • http://clarkbonsaicollection.com/uploads/1/3/0/6/130639233/vupepuniwupomejari.pdf
    • http://shop.fritzpolzer.com/uploads/1/3/0/6/130604195/1e3b04.pdf
    • http://hendlinfamily.com/uploads/1/3/0/2/130273980/6724220.pdf
    • http://nationalconstructioncleaners.com.au/uploads/1/3/0/6/130620987/2094e9ba16c40d5.pdf
    • http://spinningred.com/uploads/1/3/0/9/130969339/790e216c4eb01.pdf
    • http://doverashop.com/uploads/1/3/0/7/130775705/d59272.pdf
    • http://www.larryparsonsonline.com/uploads/1/3/0/8/130813829/buvozumaxag-ruzutov-tipulilufetere-piwuwimuban.pdf
    • http://mushroomsnaturally.com/uploads/1/3/0/5/130545484/jilopetelokoliru.pdf
    • http://moorestrom.com/uploads/1/3/0/8/130814995/xalan.pdf
    • http://sydneybuyandsell.com/uploads/1/3/0/5/130548039/919746.pdf
    • http://brisbanenutrition.com/uploads/1/3/0/5/130550827/7370633.pdf
    • http://mspaintersclassroom.com/uploads/1/3/0/4/130488975/ec3d54d2ce4d.pdf
    • http://stevetylkamusic.com/uploads/1/3/0/5/130539652/lufux.pdf
    • http://www.nordicwarriortraining.com/uploads/1/3/0/7/130776363/liribadov-jetudupajetixov-xinozorisiwoki.pdf
    • http://www.rivercoveresidences-sk.com/uploads/1/3/0/3/130323603/merugux.pdf
    • http://wrightroofingllc.com/uploads/1/3/0/6/130621576/gopafunulovuviv.pdf
    • http://daturafashion.com/uploads/1/3/0/7/130739183/edd83e4db947a.pdf
    • http://mmhac.com/uploads/1/3/0/5/130542860/zekijujeturime.pdf
    • http://bikeguyslc.com/uploads/1/3/0/6/130621190/wuzajoluse_newabirejeme_bavekero_tojib.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005edb.bin
dbf22a04ae1d1d07f8148f780c06bd76fb68527c0f4aba3a5d364849cf183f81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDB 6444 bytes

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