Malicious PDF — malware analysis report

Static analysis result for SHA-256 9679abe3427b3222…

MALICIOUS

PDF

79.8 KB Created: 2020-03-09 14:04:00 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d0e5a9bdf33206d2d96e740328c37c7c SHA-1: c228d9b8350ba20ef59e8478e28793a7b74e4ae0 SHA-256: 9679abe3427b322217e98eb017463d97050e3320bc62fc004274ef7d648313ae
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF documents hosted on various domains. This pattern is indicative of a link farm or a distribution mechanism for malicious content, leveraging SEO tactics. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://saranlpcoach.com/uploads/1/3/0/6/130639777/130639777.html#ayatul+kursi+pdf+file
    • http://centrobibliconazareth.com/uploads/1/3/0/6/130604757/5415445.pdf
    • http://benpowellconstruction-arkansas.com/uploads/1/3/0/3/130379370/dc4977e.pdf
    • http://www.wcaonlinepd.com/uploads/1/3/0/8/130874015/6886276.pdf
    • http://reneesgray.com/uploads/1/3/0/4/130492229/kalulemab_jeteru.pdf
    • http://mta-sts.thepeachcity.com/uploads/1/3/0/8/130873708/likigekegodote.pdf
    • http://nndc-india-foundation.com/uploads/1/3/0/2/130272892/vitatobovami.pdf
    • http://authenticaudiopodcast.com/uploads/1/3/0/8/130873807/db0be.pdf
    • http://ignitetalentshow.com/uploads/1/3/0/4/130436282/8465668.pdf
    • http://healthsubstancesbuse.com/uploads/1/3/0/7/130740393/bejupazeduv.pdf
    • http://southernheritagenewsletter.com/uploads/1/3/0/3/130323421/vilozog_xizuvorufiw_wulaxuwutemejis_xuzatajuva.pdf
    • http://polebarnstudio.com/uploads/1/3/0/8/130813510/4917126.pdf
    • http://coastlinecomputercare.com/uploads/1/3/0/4/130489090/rifafurezivul.pdf
    • http://friendsofhollinhills.com/uploads/1/3/0/7/130739268/3779446.pdf
    • http://babymoontrips.com/uploads/1/3/0/2/130289797/89387c4dcaf54.pdf
    • http://bergerondodgechryslerjeep.com/uploads/1/3/0/2/130289745/2f10563a475c193.pdf
    • http://digital-citizenship-awarness.com/uploads/1/3/0/2/130272580/xodolubabovat.pdf
    • http://startup-crypto.com/uploads/1/3/0/4/130489265/suvudaguraxidiwor.pdf
    • http://laurendeckercontralto.com/uploads/1/3/0/5/130590265/maworukodatare-zibepolamof.pdf
    • http://honeypuddle.co.uk/uploads/1/3/0/3/130323532/vijadojedusuga.pdf
    • http://brincolindo.com/uploads/1/3/0/7/130738882/kowipufuliramivu.pdf
    • http://bradleysteelbuilding.com/uploads/1/3/0/7/130776444/7540647.pdf
    • http://hostmaster.semipermanentmakeupacademy.com/uploads/1/3/0/2/130271137/cbf015ea9ebe884.pdf
    • http://webdisk.a-r-a.org/uploads/1/3/0/7/130776420/renufafudezaso-zegifumuxi-fitelosuva.pdf
    • http://ignitefitness.info/uploads/1/3/0/6/130620868/3588865.pdf
    • http://allisoninserro.com/uploads/1/3/0/5/130540104/766214.pdf
    • http://webdisk.a-r-a.org/uploads/1/3/0/7/130776420/
    • 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
stream_007_off0000ffa5.bin
11bb4285fac18ee6d41740cc968e28f9bf9a772501a214e79775bf7f304d53a1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFFA5 25812 bytes
font_00_sfnt_off0000d937.bin
8c3e96af02b08ba3443cc510220fb02f516919dde3a4996adad1dbfd8c88a3f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD937 1636 bytes
font_01_sfnt_off0000e13a.bin
8cd8d9937102d8d5be2c8e0eec63b6a1b1068b0e9d4cb41ab0129a42766bcc01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE13A 7828 bytes

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