Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd849a2821fcc07…

MALICIOUS

PDF

42.9 KB Created: 2020-03-20 02:21:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5ba27af2785fcadfd2ab97c35c5a9300 SHA-1: 22500b362fd75ba31247fabd5f2e3bf7a693bb4a SHA-256: bbd849a2821fcc07ed8f17e57abf8004ff0ef6a13ce2e6f5809561c680cb0ea4
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or a method to distribute malicious content indirectly. The document body itself contains garbled text and some of the extracted URLs, reinforcing the idea that the primary function is to redirect users to potentially harmful external 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://ehde.nl/uploads/1/3/0/5/130551971/130551971.html#novena+de+navidad+dia+8+el+tiempo PDF link annotation
    • http://reamerdentistry.com/uploads/1/3/0/5/130543065/9627065.pdfIn PDF document text
    • http://sujitaomgoit.com/uploads/1/3/0/7/130739607/233588.pdfIn PDF document text
    • http://viralpost.org/uploads/1/3/0/5/130589285/nidesopaketepej.pdfIn PDF document text
    • http://mylifebuilder.org/uploads/1/3/0/7/130739850/zaxasuporaja.pdfIn PDF document text
    • http://www.pccpnetwork.nhs.uk/uploads/1/3/0/4/130435546/f8a194.pdfIn PDF document text
    • http://www.pauliwan.co.uk/uploads/1/3/0/7/130776602/d1663.pdfIn PDF document text
    • http://www.trinityumcama.org/uploads/1/3/0/7/130775768/9313549.pdfIn PDF document text
    • http://kbranchphotography.com/uploads/1/3/0/8/130814591/xofurukuk.pdfIn PDF document text
    • http://beabayoubeauty.com/uploads/1/3/0/4/130477882/wiwaroxunalugewe.pdfIn PDF document text
    • http://medicinaevolutiva.com/uploads/1/3/0/6/130620758/tuxirul.pdfIn PDF document text
    • http://aaronjchandler.com/uploads/1/3/0/6/130621568/43cd98b62629.pdfIn PDF document text
    • http://danielreist.org/uploads/1/3/0/4/130490585/vomomid.pdfIn PDF document text
    • http://mccookchurchofchrist.org/uploads/1/3/0/7/130775772/zowuziwob_xukigujel.pdfIn PDF document text
    • http://musicbandtogether.com/uploads/1/3/0/4/130475936/b877af02.pdfIn PDF document text
    • http://saranlpcoach.com/uploads/1/3/0/4/130488114/9526903.pdfIn PDF document text
    • http://premierconstruction.org/uploads/1/3/0/2/130272071/seselogof-dezub.pdfIn PDF document text
    • http://syedholdingsllc.com/uploads/1/3/0/6/130639026/6948745.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
🗂 Part of campaign: sujitaomgoit.com 4 samples

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D00 8712 bytes
SHA-256: d968a8949c2586a4ae332eb54d86922935657eaf140b751de8bb2c4b8819258b