Malicious PDF — malware analysis report

Static analysis result for SHA-256 e73216651f03516d…

MALICIOUS

PDF

44.7 KB Created: 2020-10-17 17:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 78aff87afefcc9b6bcbe82ddfc355cf3 SHA-1: b195ce6b393b1ad496bbbba99411199563d9bef8 SHA-256: e73216651f03516dc9255bbea467d12d653a38e17f39ac1884fbb4b043c75d5c
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.me/123?keyword=dreams+from+my+father+full+book+pdf In PDF document text
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/4377100.pdfIn PDF document text
    • https://tadeganerusoza.weebly.com/uploads/1/3/1/4/131438541/272418.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/lokujevu.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/fogobifadezofani.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/1/0482/8649/8980/files/jonemetixafukubujesuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0878/9150/files/expository_worksheets_3rd_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1393/0142/files/haworth_zody_chair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/kilbourne_high_school_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0679/5686/files/90132984595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/89888111063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4152/0278/files/beto_2020_shirt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2070/4150/files/71578405485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8873/5125/files/how_to_uninstall_updates_for_android_apps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/78988348515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1786/5886/files/37745259758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3239/1061/files/halloween_left_right_game_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4664/1060/files/pof_paid_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2743/0059/files/xilav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4381/5065/files/67210989051.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_off00006eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB3 5588 bytes
SHA-256: 3f8d6b216f96633c01fbd03e5a132f82762265de2c619da43e12757e140e6d37
font_01_sfnt_off0000818d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818D 10468 bytes
SHA-256: 4c5ee2e20096b8c36ccb2fa95013dbef6ba82db7b18576bbcebe193b2f875bf0