Malicious PDF — malware analysis report

Static analysis result for SHA-256 085dd1b3e4271d49…

MALICIOUS

PDF

60.0 KB Created: 2020-10-21 06:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 04a449d7b378c0e4998d5bece3e92126 SHA-1: de5cc004025306c6b4c4c5ced31dca2a652717df SHA-256: 085dd1b3e4271d49762172a76379434b7eceaffff1d68a3f92fc2c38a065c4c2
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=zepp+divercity+tokyo In PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/zosiwugulifuxe.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/tusumivogemumipe.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/1af2554b028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393486/normal_5f8f6ae3f308c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_5f8aec763927a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5f8eb63821e59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5f87cb77b7697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5f8aba25c6eef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f8d57f5f06b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/65538a7e-36f3-4ecc-8c63-a0ff03a7c2c6/vavunepipopapix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8053cb0-3898-43b5-8989-296ea51b1ddb/bavipuzepezili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51acaa5d-ce98-4324-b257-ec8288e82ae4/bipavudunebugagojawusoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc6539b-e76b-47ca-85cf-5179dee5df3b/3145393258.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/boolean_algebra_in_discrete_mathematics.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/jotowuzabumubavevubelefe.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/jekuvikoseze.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/at_dev_english_to_bengali_dictionary_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b407d72b-d2be-4ffa-a895-d27193e02f16/17883390473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dbc745f-36f4-4c4a-b089-2e571a43bc2b/31661416475.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCD 18164 bytes
SHA-256: 829fbc573b4b78bd8fd2da56bafe23add1602b20749d2a22443839c303030672
font_01_sfnt_off000095cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95CB 4828 bytes
SHA-256: f9d388186bc985abed9ee0b08e9b5836c0430654d26cbdea089ed03ecb44372f
font_02_sfnt_off0000a660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA660 11296 bytes
SHA-256: 5be1d58f7c5942c261b930315e9011788a06b873c2d6cbded2e9b1dd8d3d0594
font_03_sfnt_off0000ccb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB0 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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