Malicious PDF — malware analysis report

Static analysis result for SHA-256 05de70a824162143…

MALICIOUS

PDF

39.9 KB Created: 2020-04-06 14:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3651b31e45afd436883ab69aa225abbf SHA-1: 8e8a5e8e6c6f07ba1afab084ff4a8274c96b3545 SHA-256: 05de70a824162143bceece9a5a21b2d2a5998aa90bfea2b6f02cb9fa872e4800
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body itself contains obfuscated text and URLs, suggesting an attempt to disguise the malicious nature of the links. The primary goal appears to be directing users to a network of linked websites, likely for SEO spam or to host further malicious content.

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://commeshot.com/uploads/1/3/0/2/130289763/130289763.html#glatfelter+pulpwood+co
    • http://greendesertlandscaping.com/uploads/1/3/0/5/130588344/zilakekazetok_gabolip.pdf
    • http://unitedpolitics.net/uploads/1/3/0/8/130814283/taxokimo_tajeletobul_laforemele.pdf
    • http://tutoressex.com/uploads/1/3/0/6/130604799/kefogarizoba.pdf
    • http://chubbypackage.com/uploads/1/3/0/5/130539247/bodudupikakobod.pdf
    • http://yangzhou2031.com/uploads/1/3/1/3/131380273/5425540.pdf
    • http://wrapnation.com/uploads/1/3/0/5/130545493/welozigemi_fuvenarekuv_nofasi.pdf
    • http://cheshuntteamministry.org/uploads/1/3/0/9/130969791/wasawigin_dimokobi_bevabogifo.pdf
    • http://garysnavely.com/uploads/1/3/0/3/130379408/gilodozunowitik-vasilegowusos.pdf
    • http://jskcricketbettingtipsfree.com/uploads/1/3/1/0/131070590/1ada19223.pdf
    • http://crazycowgirlentertainment.com/uploads/1/3/0/8/130814992/kikupokokajev.pdf
    • http://healthbuzzcam.com/uploads/1/3/1/3/131380916/8150672.pdf
    • http://thecannacontainer.com/uploads/1/3/0/5/130590163/2551317.pdf
    • http://seasidescribe.com/uploads/1/3/0/6/130622023/vijusisuno-sasadumogu-xipiloremu.pdf
    • http://womenconqueringcancerbk.org/uploads/1/3/0/4/130488688/kakawajugimuw.pdf
    • http://bluelotuslavender.com/uploads/1/3/0/3/130323375/1181966.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_off00007042.bin
f86636c7b584ea1b9a2193a2f3fe22de0a8d854d70da88a7dd64fe5ade060865		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7042 8632 bytes

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