Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ffa78c97e1cec3…

MALICIOUS

PDF

37.9 KB Created: 2020-04-07 16:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 64dab061ac296b4630fbee295f19be74 SHA-1: 1c7349f5879a1f1c8200969f80008e2b7c855869 SHA-256: 78ffa78c97e1cec3afc8a7f257f4d86785fe96c2fea1cddb9191eb369ed1b848
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links to other PDF files hosted on various domains, indicative of a link farm or SEO abuse. The primary heuristic identified a mass of external PDF links, suggesting a coordinated effort to distribute content or traffic across multiple sites. The embedded URLs and the document body text, though partially obfuscated, point towards a lure related to 'civil service reviewer 2018', likely a pretext to encourage clicks on the numerous provided links.

Heuristics 3

  • 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
  • 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://studiokidojo.net/uploads/1/3/0/6/130620910/130620910.html#civil+service+reviewer+2018
    • http://kidsmagazinesmatter.org/uploads/1/3/1/1/131163752/nuwigepibupibu_remobawipa_jejamu.pdf
    • http://shadowscribe.net/uploads/1/3/0/6/130604690/tujekiradelebo.pdf
    • http://unclaimedassetsnow.com/uploads/1/3/0/2/130270918/nevimutiroj.pdf
    • http://englishunleashed.com/uploads/1/3/0/4/130488829/bozedidig.pdf
    • http://source-within.com/uploads/1/3/0/6/130622075/kipilonofoj_gubuf_gulazix_lufujolosa.pdf
    • http://shanellrene.com/uploads/1/3/0/7/130776702/vobadog.pdf
    • http://theofficialinternetstore.com/uploads/1/3/0/5/130539818/9a175b3d602478.pdf
    • http://ironmarketing.co/uploads/1/3/0/4/130476122/1123771.pdf
    • http://peakperformancefeedproducts.com/uploads/1/3/0/7/130738546/saset.pdf
    • http://tomigami.com/uploads/1/3/0/7/130775002/309fbd11230d482.pdf
    • http://savvydigitalmarketinggroup.com/uploads/1/3/0/8/130873951/foviletun_sopalejomo_lagidodenamik_zujarejenepawi.pdf
    • http://archtravelservices.com/uploads/1/3/0/7/130776693/b8279a7d2.pdf
    • http://pakistanpeoplesmovement.com/uploads/1/3/0/7/130740573/josisuxoriwi-wekuvosemova-jukegerigubul-jekene.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_off00006ba7.bin
813325a60d7034b686923ea0e8c0804349e2fe08094851fdfe8e43b01ac23c14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA7 8128 bytes

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