Malicious PDF — malware analysis report

Static analysis result for SHA-256 0500fa6178a82484…

MALICIOUS

PDF

39.3 KB Created: 2020-05-13 02:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6e8bf58f3a67305c68a4a24d622f75c4 SHA-1: 214e7af695c24dc903500e6cca59943f5cf05b2d SHA-256: 0500fa6178a824844b020ce632b105832d0693651c848bf20dfe9c49d6c9d9ba
104 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, with the primary lure being a download for a 'Bluetooth device for pc free'. The ML classifier strongly indicated maliciousness, and the presence of numerous external URLs suggests a traffic-driving or redirection scheme. No scripts were extracted, but the structure and URL distribution are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://scentofliving.com/uploads/1/3/0/7/130739264/130739264.html#bluetooth+device+for+pc++free
    • http://monogrammercantile.com/uploads/1/3/1/3/131398181/13e6c25a.pdf
    • http://trifectatrips.com/uploads/1/3/0/8/130814631/2281323.pdf
    • http://satomiblair.com/uploads/1/3/1/8/131871650/rulos.pdf
    • http://lonestarmosquito.com/uploads/1/3/0/2/130289259/9562045.pdf
    • http://christiancary.com/uploads/1/3/0/5/130588380/bobid.pdf
    • http://azmoverbids.com/uploads/1/3/0/6/130621292/58469.pdf
    • http://dogoodnyc.com/uploads/1/3/0/5/130588920/54415bb.pdf
    • http://sgbtruck.com/uploads/1/3/0/9/130969310/8656017.pdf
    • http://ehammercounseling.com/uploads/1/3/0/7/130775336/d724ad6670ecc.pdf
    • http://jvmanning.com/uploads/1/3/1/6/131606412/towomelezilij.pdf
    • http://ramenerlaplagecheztoi.com/uploads/1/3/0/5/130543740/9520259.pdf
    • http://bookobsessedgirl.com/uploads/1/3/0/5/130550835/werop_welovoxemotuta_lofuzizino.pdf
    • http://oboamaenyiogugu.com/uploads/1/3/0/6/130620612/529c4592430.pdf
    • http://fella-ship.com/uploads/1/3/0/6/130639083/pamisofajov_vutabilesabubo.pdf
    • http://mikamikkonen.fi/uploads/1/3/0/6/130605080/2a5c017f42f9.pdf
    • http://bigislandtentsandevents.com/uploads/1/3/0/8/130874397/8de0d10eed9.pdf
    • http://swifttransit.org/uploads/1/3/0/6/130639882/rekuregapit-putituvupexo-galakorad-kuvedadiku.pdf
    • http://luxelashesbyek.com/uploads/1/3/0/3/130313541/wewoximeniv.pdf
    • http://crankyartists.com/uploads/1/3/1/8/131857723/4ef9e391ad8f07.pdf
    • http://midamericacrossroadscenter.com/uploads/1/3/1/4/131452976/2716920.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e82.bin
82e3b28320cd59858a5d549c03432c46c6d5107618707e3f8178673aaa396321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E82 10096 bytes

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