Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d897b099066e271…

MALICIOUS

PDF

51.7 KB Created: 2020-03-30 06:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ad995f98c8cbd465f5bc524e86946221 SHA-1: 8b305637b6e6f3a1058fb44fad74bba8317e94b0 SHA-256: 7d897b099066e2710134aabc8c3ea60a8db755b49cc74999bc168370590dcb6d
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDFs with numeric slugs, suggesting a link farm or SEO spamming operation. The document body contains a JavaScript-like error message and a URL that also appears to be a lure. The ML classifier strongly indicated maliciousness, and the sheer volume of external links points towards a malicious intent to redirect users.

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://74-123-77-221.mgwnet.com/uploads/1/3/0/6/130639557/130639557.html#typeerror+undefined+is+not+a+constructor+angular+test
    • http://redzinktools.com/uploads/1/3/0/8/130873875/sedubapokogoriw_mobizifes_gobozutosil.pdf
    • http://nextviewtechnologies.com/uploads/1/3/0/5/130551330/rowovam.pdf
    • http://anaturalclean.com/uploads/1/3/1/4/131407742/lividerejelelu_sogabokip_reteletonon.pdf
    • http://danilopoulos.com/uploads/1/3/1/4/131406105/bamodaji_xujovorotida.pdf
    • http://thriveinc.org/uploads/1/3/0/4/130435811/videdik.pdf
    • http://justinwantstoworkfortacobell.com/uploads/1/3/1/3/131380739/dasogubuseb_zemaxo.pdf
    • http://bogieoneaviation.com/uploads/1/3/0/6/130604027/0c3fd.pdf
    • http://logisticenter33.com/uploads/1/3/0/5/130590059/792985.pdf
    • http://landream.com/uploads/1/3/0/5/130538931/zopapi-basopozan.pdf
    • http://probemagmedia.com/uploads/1/3/1/1/131163774/sisadasebowasomuziwu.pdf
    • http://mhsmustangs4mustangs.com/uploads/1/3/0/6/130639082/3717748.pdf
    • http://synergymedicalmgmt.com/uploads/1/3/0/2/130289315/4484713.pdf
    • http://jimixanadu.com/uploads/1/3/0/2/130270872/gerekekomonomeguralo.pdf
    • http://thejourneytoloveandlight.com/uploads/1/3/1/0/131069762/zipinifusazofumalaka.pdf
    • http://madcowstickers.com/uploads/1/3/0/2/130272432/523edc7f8.pdf
    • http://adventureswithrover.com/uploads/1/3/0/5/130538950/vonivijuset-sugopusodulis-dugodibiza.pdf
    • http://icsetssh.com/uploads/1/3/0/9/130969722/gowoto_dixuvobalidebu_renuwaxodopova_jexulegefigekuv.pdf
    • http://nadinecooke.com/uploads/1/3/0/3/130323968/sesuto-wuvelaxonadeguz-wolipodagi-letetudevilo.pdf
    • http://expressprinting915.com/uploads/1/3/0/7/130739628/firojujapub.pdf
    • http://thepianoandmore.com/uploads/1/3/0/7/130776873/6912450.pdf
    • http://witchwayiwander.com/uploads/1/3/0/8/130813849/304664d7fc.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_off000099c0.bin
4cb44dc6f3fc53df38fc03fa834c5a7f6ea009d9bc490c1cc727a31708a3f3ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99C0 9836 bytes

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