Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f2acfb4f95f661…

MALICIOUS

PDF

46.2 KB Created: 2020-10-14 19:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 311eac06fab38f759251c2e3a9ab7bdc SHA-1: ee2edfd8ba5228e85c31547f7e32427946f696c1 SHA-256: 58f2acfb4f95f6614058b8a547a0f5e805cde25c44aaca7db4b37e83d523d8cc
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://ttraff.club/pify?keyword=definition+of+exploratory+research+pdf In PDF document text
    • https://site-1038597.mozfiles.com/files/1038597/11657944472.pdfIn PDF document text
    • https://site-1038323.mozfiles.com/files/1038323/43645337399.pdfIn PDF document text
    • https://site-1039583.mozfiles.com/files/1039583/24710332243.pdfIn PDF document text
    • https://site-1036955.mozfiles.com/files/1036955/bepiropokowamepezosagupi.pdfIn PDF document text
    • https://site-1039861.mozfiles.com/files/1039861/kipirixo.pdfIn PDF document text
    • https://site-1042199.mozfiles.com/files/1042199/22245590312.pdfIn PDF document text
    • https://site-1036993.mozfiles.com/files/1036993/fizakimip.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/f4cd92492c37.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/a63fb.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5d6f2da.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/mukobuf.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/6497588.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0174/7877/files/84421978527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6031/2232/files/certified_scrum_master_exam_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4721/9100/files/miroradegewexajeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf4fd6be-46ab-4dd8-8938-11c16add5a57/94922144477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453fdad5-35bb-4862-9a7a-8740147daf56/96229214068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9334dc48-b754-4683-bc0d-b8a43b83e991/94527945279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8199/7717/files/ponixaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0813/0981/files/free_psn_codes_no_human_verification_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/cold_steel_espada_xl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9191/3632/files/cuisine_de_rue_bangkok_guide_michelin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5344/5020/files/laberulolifuvinomimi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75AB 5412 bytes
SHA-256: 0154b3a44aefe756d0bf8fb16e766a79ce5c5af7ed335b919813f543fce1aaeb
font_01_sfnt_off0000880f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880F 10228 bytes
SHA-256: 64cfb2b976e95000fff7f057c276df342f285bcc9229639d033013297e4881ea

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