Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69934bf7f5f958c…

MALICIOUS

PDF

40.5 KB Created: 2020-03-16 16:20:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e5895e9aa2d54cea1ea0c21ac49fd06a SHA-1: 82c90479950896027434be2c1adbe47012cfb9db SHA-256: b69934bf7f5f958c949f6567a97521478d1e8bcd8fd66c78cdbbdef905a51dcb
96 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 as a PDF link farm. The ML classifier strongly indicates maliciousness. The document body, though partially corrupted, contains references to URLs that are also present in the list of extracted URLs. The primary attack pattern appears to be SEO spam or a redirection scheme to host malicious content on numerous domains.

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://kohno-corp.com/uploads/1/3/0/6/130639312/130639312.html#moonlight+in+the+morning+by+jude+deveraux
    • http://morganosmanipsychotherapy.com/uploads/1/3/1/0/131070247/bidexozitatuda.pdf
    • http://wakeforestfarmersmarket.com/uploads/1/3/0/4/130476492/vetitedofoku.pdf
    • http://gabriellehasamearphotography.com/uploads/1/3/0/7/130776526/1395106.pdf
    • http://jamiemmcclain.com/uploads/1/3/0/4/130476273/nabemopakofinuv.pdf
    • http://ewth.net/uploads/1/3/0/3/130313358/92f1dc88f875a7.pdf
    • http://kobrathelabel.com/uploads/1/3/0/5/130540406/5624014.pdf
    • http://nashvillerollingpins.com/uploads/1/3/0/4/130488451/3524857.pdf
    • http://hostmaster.alfonssmeets.nl/uploads/1/3/0/4/130489132/4749675.pdf
    • http://heelingnow.net/uploads/1/3/0/5/130541743/bf368ef080611ea.pdf
    • http://encore-solu.com/uploads/1/3/0/6/130621951/mijigalakag.pdf
    • http://productionfront.net/uploads/1/3/0/2/130288479/dofijeki_giguvu_karodunit.pdf
    • http://hostmaster.doorstepdances.co.uk/uploads/1/3/0/2/130273894/guwewosilolimezek.pdf
    • http://tlanigan.yukonschools.ca/uploads/1/3/0/6/130640006/6d978eba.pdf
    • http://colaboarate.com/uploads/1/3/0/6/130639745/sisifixezib-botepena-takitala.pdf
    • http://heartofindigo.com/uploads/1/3/0/6/130604986/4877446.pdf
    • http://honourosis.com/uploads/1/3/0/6/130604795/kasuzixelekasipate.pdf
    • http://quotebeast.net/uploads/1/3/0/7/130776571/sitoviferijevep_dezaki_birorujav_gudaxod.pdf
    • http://choosesani.com/uploads/1/3/0/7/130776553/lujegedevapoteku.pdf
    • http://skydive-maui.com/uploads/1/3/0/5/130588644/nemusopoxi.pdf
    • http://moonmountainsonoma.com/uploads/1/3/0/6/130639646/zarodixixekuvof.pdf
    • http://luckyrabbiteditions.com/uploads/1/3/0/6/130620429/fufowujojimisi-wozosekubexojof-vidoron-ravuneza.pdf
    • http://scricco.org/uploads/1/3/0/7/130776629/9259009.pdf
    • http://conroetreeassist.com/uploads/1/3/0/2/130291673/fetezubim.pdf
    • http://conroetreeassist.com/uploads/1/3/0/2/130291673/fe
    • 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_off000078f2.bin
f4c248b879871e7addfc57dc09728bebbb578c792dc732111dcec723db01f2ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F2 6852 bytes

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