Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffb41b0d2af814b…

MALICIOUS

PDF

43.5 KB Created: 2020-03-29 13:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7d576b8cf392b0dc90380f6d8421c8d4 SHA-1: d450b891711e5580e0db594478e03be0c0c605dc SHA-256: 0ffb41b0d2af814b74b31ac21778c4d5d2e54806cb72f92a3ac3458c58d4563f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

This PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially corrupted, includes a URL that is also present in the list of extracted URLs. The primary function appears to be directing users to a network of websites, likely for malicious purposes such as SEO spam or hosting 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://lennoxweb.com/uploads/1/3/0/6/130620366/130620366.html#writing+skills+ensure+effective+business+communication
    • http://ryannbull.com/uploads/1/3/0/2/130271232/nesuwimoxudiletog.pdf
    • http://abetterbc.com/uploads/1/3/0/2/130289749/wunokutotomip.pdf
    • http://created2bsweet.com/uploads/1/3/0/7/130776338/popixabazuder.pdf
    • http://stoutlending.net/uploads/1/3/0/4/130483756/jobedorozebamibew.pdf
    • http://www.schantzproduce.com/uploads/1/3/0/2/130272443/6652526.pdf
    • http://superiorcleaningllc.com/uploads/1/3/1/4/131407465/fegaven.pdf
    • http://watkinsprofessional.com/uploads/1/3/0/6/130603789/moxosusajozim.pdf
    • http://shannonsresaleonline.com/uploads/1/3/0/8/130814877/zinasanojunu.pdf
    • http://encouragemyself.com/uploads/1/3/0/3/130324092/romovusa.pdf
    • http://mafijagracija.lt/uploads/1/3/0/4/130483271/sajolufewo.pdf
    • http://annotalegal.com/uploads/1/3/1/4/131437983/7000383.pdf
    • http://houstonsynchrostars.com/uploads/1/3/0/6/130620849/kofozakeguvalarisud.pdf
    • http://fgccontracting.net/uploads/1/3/0/3/130323630/2249720.pdf
    • http://bitcoinchristmasgifts.com/uploads/1/3/0/7/130775374/9985298.pdf
    • http://avoid1800stranger.net/uploads/1/3/1/1/131163691/a9bcfddd6e4a.pdf
    • http://cjonathanschmitt.com/uploads/1/3/0/5/130589309/0b645b7dd.pdf
    • http://thehighlandparkgrille.com/uploads/1/3/0/9/130969442/6780576.pdf
    • http://vtflowerclub.com/uploads/1/3/0/7/130776025/pavamoz_petusirej.pdf
    • http://wyatt-alexander.com/uploads/1/3/0/3/130313729/a78f28119608b6.pdf
    • http://chuckatucktradingpost.com/uploads/1/3/0/6/130640025/mojapepi.pdf
    • http://tuliptreatments.com/uploads/1/3/0/7/130776316/7281922.pdf
    • http://rielaxxed.com/uploads/1/3/0/5/130546432/8448967.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_off00007fde.bin
a14f603447d3effcab46f1aca1498943fe92f0f4e2f3750673b12241e815007c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDE 7772 bytes

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