Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f2fb038b2a3501…

MALICIOUS

PDF

40.4 KB Created: 2020-03-21 15:08:43 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6503a7f428e93199bcd41e36db67f028 SHA-1: c6d67301f2aea263ed7cbfb77e6d6cb85fd05740 SHA-256: 70f2fb038b2a3501c4048a4c2183420cd7d4346b2e22c6338654e4f048165f1c
96 Risk Score

Malware Insights

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

The PDF document presents a lure about refilling a torch lighter, but its primary function appears to be a link farm, containing numerous external links to other PDF files. This technique is often used for SEO manipulation or to distribute further malicious content. While no scripts were directly extracted, the PDF structure and the presence of many external links suggest a malicious intent to redirect users to potentially harmful sites.

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://bridgestreampublishing.com/uploads/1/3/0/4/130483412/130483412.html#how+to+refill+a+torch+lighter+with+zippo+fluid
    • http://webmail.lv01.hendersonchamber.com/uploads/1/3/0/4/130491271/tuxiwezal-zodubil.pdf
    • http://jonesdoghomes.com/uploads/1/3/0/7/130738707/zidewepezajuwugutapu.pdf
    • http://pressurewashingtorrance.com/uploads/1/3/0/6/130622111/vafenajuribi-masofenupebilik-dozabazosowimu.pdf
    • http://www.websitetransformer.com/uploads/1/3/0/7/130739452/c9cd4.pdf
    • http://merbeinhistoricalsociety.com.au/uploads/1/3/0/5/130589317/406d8.pdf
    • http://tamarakerrenterprises.com/uploads/1/3/0/8/130814205/mutobezo-givuwezi-xibabufilaxar-zevomaxat.pdf
    • http://www.forindianola.com/uploads/1/3/0/2/130271097/fc647.pdf
    • http://brownestonetravel.com/uploads/1/3/0/6/130620603/8095943.pdf
    • http://whyromefell.com/uploads/1/3/0/7/130776082/8c96e47284e262.pdf
    • http://www.alarmsmeath.com/uploads/1/3/0/5/130543070/wifod.pdf
    • http://azaniaradio.com/uploads/1/3/0/8/130813849/suwega.pdf
    • http://shopbombbomb.com/uploads/1/3/0/6/130639693/luvejosebo.pdf
    • http://firstaidmatters.ca/uploads/1/3/0/6/130621276/nigepire_sajapo_gigivu.pdf
    • http://rdnu2u.com/uploads/1/3/0/5/130588678/7385988.pdf
    • http://thespectrumnetwork.net/uploads/1/3/0/7/130776571/6ff7cd8c0b5a.pdf
    • http://nwcenterautos.org/uploads/1/3/0/9/130969308/kakox.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_off000072bd.bin
c290d1395c5750bb069c51aded4793c68fd0cdbad0d663450d6c22ec35d856c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72BD 8140 bytes

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