Malicious PDF — malware analysis report

Static analysis result for SHA-256 73121101c813cd93…

MALICIOUS

PDF

47.6 KB Created: 2020-10-26 00:46:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 69a50692328784e0dc6351dd95d23a43 SHA-1: 117e84c2c2b925c2b903d40c3f4aa22cdcd23723 SHA-256: 73121101c813cd93a37bab17e541cc94f2cf0d40887ea3d70633583928a7112e
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://cctraff.ru/aws?keyword=illustrator+reduce+pdf+size In PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/3b57510646cec.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/waxojug.pdfIn PDF document text
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/vubebuzi-safavenotivuf.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://cdn.shopify.com/s/files/1/0478/9177/5654/files/creepy_things_to_say_to_someone_while_hugging.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0364/0990/files/ninusuduzatepetimedodisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0880/0922/files/chat_backup_whatsapp_android_lschen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/2655/2264/files/fabius_plus_xl_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1051/4334/files/78309320540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5cc8834-9c78-45b8-94da-b312788597fe/teminatitajuvawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a65505e-99c0-4289-9c51-9ab729a327bb/patimonazaluga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7051/3858/files/lafanefufusatadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2743/0059/files/50066693408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5460/2658/files/45378819939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8518/8258/files/grout_gun_harbor_freight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6378/8188/files/nkjv_bible_offline_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7034/9731/files/28414132157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5328/4008/files/pejazozopiwazarokezikos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6332/8424/files/books_for_7th_graders_who_dont_like_to_read.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/96393041394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0931/0359/files/60_day_fitness_plan.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_off00006d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4F 4912 bytes
SHA-256: e5b862915e7c8037d8f6384ae2510d7fdb11cf2eecb8cddaa859b2fef2c7e1d3
font_01_sfnt_off00007e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E15 10676 bytes
SHA-256: 65037d0a9bdc799a3661d064a83bf1ce9ef899848c239edf648c6d3a5536ea4c
font_02_sfnt_off0000a28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA28E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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