Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a57fabca6fe5f84…

MALICIOUS

PDF

41.2 KB Created: 2020-10-06 19:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6bee112ce2a091736855ab6d74c68712 SHA-1: bac57711255f3fa9b392bb3a2f64a188ca200151 SHA-256: 3a57fabca6fe5f84efaa734b16638887050bd99df844a186309538f01f4e8e69
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/pify?keyword=sprinter+hacked+unblocked+77 In PDF document text
    • http://files.rumblefishclub.com/uploads/1/3/1/8/131857758/woraz.pdfIn PDF document text
    • http://zisagaw.kelly-johnston-art.com/uploads/1/3/1/1/131164250/c0e341dd3ed9829.pdfIn PDF document text
    • http://buparitin.royaltysflame.com/uploads/1/3/1/6/131637921/9999547.pdfIn PDF document text
    • http://buzipab.birdhousepdx.com/uploads/1/3/1/4/131437987/wolaledebobojulo.pdfIn PDF document text
    • https://site-1038407.mozfiles.com/files/1038407/37727266885.pdfIn PDF document text
    • https://site-1036935.mozfiles.com/files/1036935/56095081460.pdfIn PDF document text
    • https://site-1040682.mozfiles.com/files/1040682/wejepikaponotoju.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/32102234168.pdfIn PDF document text
    • https://site-1038949.mozfiles.com/files/1038949/99795383460.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://uploads.strikinglycdn.com/files/42d61f99-52a5-4381-8a3b-d1866e901973/dadadevexomemopovup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9033/7182/files/christie_caudill_cincinnati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3372/5592/files/51563944399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/5485/8908/files/volatile_market_in_a_sentence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6515/9069/files/magnolia_pointe_apartments_longview_tx.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_off00005448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5448 5252 bytes
SHA-256: f1d13f1c630afe9fdefc1c6a9716ab09673adc6b05dd945d955cf95c1d9efdcd
font_01_sfnt_off0000660c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660C 10456 bytes
SHA-256: 81dbc7710770d98cccdfd0c9c1b64696dc1d04d1d82b25f97627cdddfd54adba
font_02_sfnt_off000089ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89CA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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