Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a955876a3031e1…

MALICIOUS

PDF

55.2 KB Created: 2020-04-03 11:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3651d9c370b8d944d8d561f62a643237 SHA-1: cbb8416e26da4547e6253262a911709f50cb041c SHA-256: 22a955876a3031e1f806114270d09fe49036eca6227c8badb4474f838969f5e9
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body text, while partially corrupted, includes a URL that is also present in the list of extracted URLs, suggesting a deliberate attempt to direct users to external content. No scripts were extracted from this sample.

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://shelbyscoolaf.com/uploads/1/3/0/6/130605084/130605084.html#comentario+de+texto+sobre+el+manifiesto+comunista
    • http://rebeccalynnjewellery.com/uploads/1/3/0/8/130814672/tukumoli-bukidimobov-mazijewelif.pdf
    • http://fuzzybuttsdaycare.com/uploads/1/3/0/6/130621622/c5602.pdf
    • http://mygreencirclerealty.com/uploads/1/3/0/4/130477131/nadidup.pdf
    • http://maryandtuxbridal.com/uploads/1/3/0/7/130739214/e4d83faf2bb6.pdf
    • http://aarccollections.com/uploads/1/3/1/4/131437886/87740d1122f4.pdf
    • http://mpeach.co/uploads/1/3/0/7/130739454/zegovologojalasanow.pdf
    • http://cramerclass.com/uploads/1/3/0/4/130436096/zevijomu-nuneberujorobi-viweraderow-zapazusezapozu.pdf
    • http://chatthillscommunity.com/uploads/1/3/1/3/131379550/3257066.pdf
    • http://gfecouture.com/uploads/1/3/0/5/130588573/1955305.pdf
    • http://schneidercleaningservice.org/uploads/1/3/0/5/130551754/144443f9d6b.pdf
    • http://motwh.org/uploads/1/3/0/4/130490609/106696.pdf
    • http://osxnasozi.com/uploads/1/3/0/5/130550775/72c038.pdf
    • http://3bellsartisans.com/uploads/1/3/0/6/130620737/8580834.pdf
    • http://thecshs.com/uploads/1/3/0/6/130604939/fugovu.pdf
    • http://mychickadeesfuntasticnest.com/uploads/1/3/0/2/130270831/fafumapesijag_tedexiwuz.pdf
    • http://tinytentsau.com/uploads/1/3/0/9/130969591/952413.pdf
    • http://trentriverdesigns.com/uploads/1/3/0/2/130271016/f72c8.pdf
    • http://brave-lifestyle.com/uploads/1/3/0/5/130544134/lomakumugexuje.pdf
    • http://wilsonmemorialtrust.org/uploads/1/3/0/6/130605422/mekuzuxej-joludinuj.pdf
    • http://pgdsoutions.com/uploads/1/3/0/8/130814995/bfb1bb513aaa.pdf
    • http://crystalshoressoapco.net/uploads/1/3/0/6/130621579/8729403.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009836.bin
0c311f42fa5e915a51c8fb247aa08b2247d12a471de9efc618c5f8fd3ba89469		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9836 8768 bytes
font_01_sfnt_off0000b7f7.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F7 16036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.