Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e652ccd727f9890…

MALICIOUS

PDF

41.9 KB Created: 2020-03-27 09:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 62fb660ce16b5ba781ff097d0131b912 SHA-1: c262c66bb98a05ce2cc7d47204012ca97262c77f SHA-256: 1e652ccd727f9890d9f93b22c7221bc419ac1dc95d025c4fbf4acb8dc08d63bf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links pointing to various domains, indicating a link farm or SEO abuse tactic. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior. While no scripts were extracted, the sheer volume of outbound links suggests the primary purpose is to redirect users to potentially malicious or deceptive content hosted elsewhere.

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://andresexpres.com/uploads/1/3/0/2/130270996/130270996.html#construccion+del+conocimiento+cientifico+ensayo PDF link annotation
    • http://www.vakantieinmiddelkerke.com/uploads/1/3/0/4/130483783/kegugegirefizev.pdfIn PDF document text
    • http://elitevp.com/uploads/1/3/0/7/130776067/xexok_muwed.pdfIn PDF document text
    • http://dorzasdrivingschool.com/uploads/1/3/0/6/130620337/115edb48.pdfIn PDF document text
    • http://bodybarn.net/uploads/1/3/0/6/130620327/1082ea4a64a8c.pdfIn PDF document text
    • http://barretts.tech/uploads/1/3/0/8/130874162/04f8f.pdfIn PDF document text
    • http://my-chat-random-thoughts.club/uploads/1/3/0/6/130640178/bukewatijim_bogiwim_beduzutiweb.pdfIn PDF document text
    • http://balabiottpisa.com/uploads/1/3/0/6/130620871/9942700.pdfIn PDF document text
    • http://paparazziservices.com/uploads/1/3/0/2/130271081/mimewixufimamap-voximibiv-lomejita.pdfIn PDF document text
    • http://primerofianzasmx.com/uploads/1/3/0/8/130814831/ead2fa40cd01.pdfIn PDF document text
    • http://corpoevida.info/uploads/1/3/0/4/130490786/1307789.pdfIn PDF document text
    • http://dsacmarbel.com/uploads/1/3/0/5/130551718/sekozumawafonenesoru.pdfIn PDF document text
    • http://shopraebtq.com/uploads/1/3/0/7/130738975/topopegej_notupupibiz.pdfIn PDF document text
    • http://ancestryseekers.com/uploads/1/3/0/6/130621510/vixuzugigik_kekebipolom_moxopapoxatine.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C6 9264 bytes
SHA-256: c546eadff56582bf4a5182d492c0076da0cddc8b42a9c76ce1bd82d58fc02db1