Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3ea05360ae8ea8…

MALICIOUS

PDF

34.0 KB Created: 2020-10-06 18:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e1f68d7bdaeaa7804bcebc5f178a03a9 SHA-1: 7bb624daebe3d83854041588a87c3602198e52d6 SHA-256: fd3ea05360ae8ea810ab2fdf08de4449cbb1c2854e2cce1487177ac44ce3d34b
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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/strik?keyword=peltor+ws+alert+xpi+bluetooth+manual In PDF document text
    • http://pudupobep.nextav.online/uploads/1/3/1/3/131383621/3537399.pdfIn PDF document text
    • http://files.fotaburdur.com/uploads/1/3/0/7/130739060/donobaf_zipivubojixujaf.pdfIn PDF document text
    • http://files.corsetranch.com/uploads/1/3/0/8/130814596/vitugilirune-garul.pdfIn PDF document text
    • http://files.supportingsuperstudents.org/uploads/1/3/1/8/131871692/konowapodawu-newuzukadura-gakikugoponube.pdfIn PDF document text
    • http://files.truelinestranslations.com/uploads/1/3/1/3/131378930/rusudok.pdfIn PDF document text
    • http://files.discountinsulation.net/uploads/1/3/0/8/130874510/e7e7e7d90433.pdfIn PDF document text
    • http://tamakupef.thewhitefamilyreunionisaiahcarrie.com/uploads/1/3/0/7/130775432/jirogak.pdfIn PDF document text
    • http://files.gethealthyknox.com/uploads/1/3/0/7/130775118/1232919.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/1/0483/2208/5017/files/disk_or_disc_a_field.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6988/5601/files/lebidofuzupiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0636/9697/files/66062130133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3975/9263/files/the_orange_peel_utah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0504/5668/files/45916001273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5794/6522/files/mrs._dalloway_1997_english_subtitles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8351/7092/files/gnc_amp_wheybolic_extreme_60_ripped_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1689/0786/files/lenipulitigiwotisokevewu.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_off00004733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4733 5360 bytes
SHA-256: 8ad463a12aaec041f09aeec7cf98adc0809f3e35b8a301a7746ff2000e823cef
font_01_sfnt_off00005952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5952 9816 bytes
SHA-256: 2e37e84959f1187468108746351e69e6169d58870ab5aad4cbdb966815f84a2b