Malicious PDF — malware analysis report

Static analysis result for SHA-256 7adfb45eeef46e45…

MALICIOUS

PDF

38.2 KB Created: 2020-11-06 04:09:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ffc0404b116694d278c0f0d21aef7dc6 SHA-1: a9af16ccfaa0c04400f4d06c557b5afd03859697 SHA-256: 7adfb45eeef46e45751014b235a87af3cdbdd90f5c85ba6c73c39b5da572ad11
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 https://trafffe.ru/aws?keyword=free+funeral+invitation+template+word PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f8e41a9864e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389820/normal_5f8f1878c5e94.pdfIn PDF document text
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/4953244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f884319f1efb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5f94e6fa95fb5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nezanurugega/ordeal_by_cheque_by_wuther_crue_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/tiwukegixoxebofitij.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/tracing_arabic_letters.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/free_dvd_shrink.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/harry_potter_mongol_heleer.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/arya_samaj_havan_book_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/64364753274.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CD9 5000 bytes
SHA-256: 2eebb7a41c6d961085b97142b14ea1f3073188cc6fd885f746a9eb8c789ef66e
font_01_sfnt_off00005dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD3 9376 bytes
SHA-256: 61111dbdefc752c2655fc39bb6982aa5dc1201e58a35f42cc75e351834610234
font_02_sfnt_off00007de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE5 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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