Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbc66a84c09248d…

MALICIOUS

PDF

45.8 KB Created: 2020-10-27 03:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b2e8301a7747b87e0143a05c51696e62 SHA-1: 05ef9fc2ead77ca5ffb8ab184528bfc9b9bda331 SHA-256: 3cbc66a84c09248d8b30d3a40a80cd743d9862a1d1467c0f0282bf83eb66bf9c
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/123?keyword=what+muscles+do+shake+weight+work In PDF document text
    • https://jafowunasakubiv.weebly.com/uploads/1/3/1/4/131437393/gireruposabepupur.pdfIn PDF document text
    • https://sonefuvik.weebly.com/uploads/1/3/4/3/134325549/temosogit.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/3646353.pdfIn PDF document text
    • https://seranogi.weebly.com/uploads/1/3/4/2/134265977/281c2b719b205be.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/sebutimikasilabeb.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/7901005.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/jirasemogivepu_pewiwodar.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/6791123.pdfIn PDF document text
    • https://xamurifepugep.weebly.com/uploads/1/3/4/4/134484548/4345129d.pdfIn PDF document text
    • https://fisizupesaxog.weebly.com/uploads/1/3/1/6/131636899/nanajuzejurevibi.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/mikukinib.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/1058989.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/837046.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000706e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000706e.bin)
    • https://cdn.shopify.com/s/files/1/0499/6287/7081/files/89718410633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0462/5579/files/lancia_homes_fort_wayne_indiana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9007/0689/files/62229397363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0459/4846/files/70121307348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2775/8763/files/72313939915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7277/4849/files/measure_maps_pro_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7467/5371/files/polaris_rzr_170_efi_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0054/4418/files/notupofojiwofoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5595/3558/files/how_to_do_an_italian_american_accent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2562/4988/files/71542961040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1512/5662/files/android_volley_get_error_message.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 extracted file (font_00_sfnt_off0000706e.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000706e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706E 5520 bytes
SHA-256: de408462657f7739b28b280060311c8ccbb21e0ab7d00e520bffa7c6ee88ad33
font_01_sfnt_off0000831f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831F 11340 bytes
SHA-256: 004a34366cd4e533defc2556b0d1146edfdfb6bda3fcd5a5a41c05dbae5e4f5a