Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e37f1cf04bdb053…

MALICIOUS

PDF

46.9 KB Created: 2020-10-31 13:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 01007d6ba2d70f3fcd12c55cc67cab8e SHA-1: 8eb6b0d5d125766c621801eaa3226266fdadffea SHA-256: 7e37f1cf04bdb0532480511272539dd33be506e9463f92ce99d2f2cf46f77c45
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/123?keyword=the+revolution+will+be+televised+quote In PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/3405673.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/408b4ecdfa.pdfIn PDF document text
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/nifazaluve_zosevigobebalir.pdfIn PDF document text
    • https://monubigikupo.weebly.com/uploads/1/3/4/4/134493781/b5706f4cb9f593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f8816154970b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f89f323b658f.pdfIn PDF document text
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/3924840.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/1/0435/5093/3156/files/business_writing_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4846/8631/files/out_of_the_abyss_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84abaf70-be30-47a7-bedf-45eff0b5bf09/68230990912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7488/7090/files/android_10_beta_s9_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/647248c3-3447-4a89-a2a3-71d36263a90b/legend_book_series.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9331/9068/files/fluke_115_true_rms_multimeter_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/0942/2493/files/stefan_and_caroline_kiss.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6629/0076/files/17638316540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/6414/9168/files/xalibojujawobatulew.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_off00007717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7717 5068 bytes
SHA-256: 772917ec2292ae2df94b170ad700f4688144af99c4d558ad820211f419f2fd01
font_01_sfnt_off0000885e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885E 11092 bytes
SHA-256: 80c685c9b88eed8d4ce17e419eef95a38f014cc08abd59585056a22ba9cfd126

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