Malicious PDF — malware analysis report

Static analysis result for SHA-256 b73b791a36239f7a…

MALICIOUS

PDF

44.4 KB Created: 2020-03-30 00:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 72d777396b05c545b7a5efd676f140e2 SHA-1: e1435006d099f94ca014acb6c1d227ab1c0b3640 SHA-256: b73b791a36239f7ac11b74ecde983ef8f478311f76976ad15a8190e50d405461
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. The document body mentions 'Paralisis del iv par craneal en ni os', suggesting a lure related to a medical condition in children. The primary heuristic indicates a link farm strategy, aiming to drive traffic to numerous external PDF documents. The embedded URLs are likely part of this link farm, designed to direct users to potentially malicious content or phishing sites.

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://7levelselling.stefanaarnio.com/uploads/1/3/0/6/130639699/130639699.html#paralisis+del+iv+par+craneal+en+ni%C3%B1os
    • http://reflexionswaco.com/uploads/1/3/0/7/130775201/toketaki-tutajuf-doseri.pdf
    • http://monagarciamusic.com/uploads/1/3/0/4/130435638/xikajokudu.pdf
    • http://ridgelineleadership.com/uploads/1/3/0/4/130477278/wuwunem_pozibalalo.pdf
    • http://oversiteproductions.com/uploads/1/3/0/6/130621552/3334342.pdf
    • http://handychevreuil.com/uploads/1/3/0/2/130287923/sefowugokarezuk_pobesizumomu_xuxijejaxemog_tipewugifudusos.pdf
    • http://matthewsingerucla.com/uploads/1/3/1/3/131381839/lofevow.pdf
    • http://ericweitz.net/uploads/1/3/0/4/130483770/2632699.pdf
    • http://crunchyricemedia.us/uploads/1/3/0/9/130968934/govoxar_powam.pdf
    • http://outlawdj.com/uploads/1/3/1/0/131070774/mapiwi_butoradud.pdf
    • http://herballeaf.net/uploads/1/3/0/2/130288559/6d7dd4ceeab.pdf
    • http://summer-maths-activities-challenge.com/uploads/1/3/0/6/130639370/ed56027674d921.pdf
    • http://rvfdaz.org/uploads/1/3/0/6/130639578/kepabuvevaxitotuga.pdf
    • http://pwrpitching.com/uploads/1/3/0/7/130775474/1473429.pdf
    • http://samanthalawsonart.com/uploads/1/3/0/3/130313075/runedajavepu.pdf
    • http://awakeningofthedaychurch.com/uploads/1/3/0/8/130814100/8328a44b843.pdf
    • http://clinkercafe.com/uploads/1/3/0/4/130475921/wupuwinog.pdf
    • http://aliciashouse.net/uploads/1/3/0/6/130639509/kerutularizam_jamupij.pdf
    • http://bixbyhoco.com/uploads/1/3/1/4/131406181/sutepokazoz.pdf
    • http://parkrapidshomeinspections.com/uploads/1/3/0/6/130639283/281766414b4fa.pdf
    • http://staveleysportsassociation.com/uploads/1/3/0/3/130313590/juwododezikigadunir.pdf
    • http://hollowboneartistry.com/uploads/1/3/0/9/130969552/wigilu_tetamurabel_mimafufigeja_selubelujoz.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_off000082d5.bin
9c56b544adb126c05fb0d1e47a466f059e73ce63c320080057cae4290fbc77af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D5 8440 bytes

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