Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e551523d0679a2…

MALICIOUS

PDF

41.7 KB Created: 2020-10-23 00:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 94aff42bbb9d8ebc3c79d28910cc8ba4 SHA-1: debe7c05ac0701c10c15487cee71c2eee89bb563 SHA-256: 40e551523d0679a2d6066abfadd408d68ecaf1bd9c480d2e7ec53ef925c591b2
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://ggtraff.ru/pify?keyword=interpretation+of+data+pdf In PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/xofamolareniviji.pdfIn PDF document text
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/b98b076f11a.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/4877954.pdfIn PDF document text
    • https://porimejonawi.weebly.com/uploads/1/3/4/3/134368737/rijofokisuladora.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/1/0435/0056/8736/files/pomag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7580/7648/files/xowikulobiferin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8661/8017/files/manual_dynamic_tilt_wheelchair.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/nofekuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8556/8431/files/sanitary_napkin_translate_to_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3994c69a-0333-46f0-a63c-40b0be9d39e8/39164127590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca56afd4-25a4-426e-9357-03236ee66ffe/gafuzof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74d9b41e-1b61-4aa6-a3ea-374514a1dc8c/jijunodesuzugowudifujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7888/4759/files/woreruzogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/0150/3897/files/65181142791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/64451151779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3180/9176/files/62859673121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6042/4615/files/xakamepumimamubetuwanezaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/1400/5407/files/color_that_starts_with_e_in_spanish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4857/8471/files/85019301001.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/physical_therapy_for_frozen_shoulder_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/99459655019.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_off00006797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6797 4760 bytes
SHA-256: 47320113c3fb8b705a377f782e4d94ea72fa09055646e10d678f9c50a840ac5a
font_01_sfnt_off000077cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CB 9992 bytes
SHA-256: 7fe28d3233f049df8b5bc65ae26bcbc699baba5c469c5830e4dcd57b9683ca88

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