Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86357c3332f3415…

MALICIOUS

PDF

40.3 KB Created: 2020-10-29 06:40:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 413a13240853bf4b69c3e616e215b640 SHA-1: 22b254af76c6a93ec1d7038bdd9d1eff49988556 SHA-256: f86357c3332f3415986c40b61a6384322b8975385ca449ef5b921ee1e2450787
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=bond+breaker+tape+lowes In PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/cdd1465cd2a15.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/tunitulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f8caa00a3e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_5f8ebe68c666e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f8de643e914c.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/1/0440/2321/8341/files/61989189155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1285/8278/files/adam_and_eve_welcome_kit_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4680/4900/files/himno_del_sena.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/john_fogerty_the_old_man_down_the_road.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/landslide_information_in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5978/1023/files/2020_subaru_outback_3.6_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5287/3919/files/elder_scrolls_online_item_prices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a94c3a-ac29-445c-9c02-f32d9ac49d9e/41951241642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0802/3966/files/snakes_indiana_jones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88f625f1-3b29-4045-92ac-67b37be9609b/pre-_k_class_dimensions_guide.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_off00005eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAF 5296 bytes
SHA-256: aec076151e3adcb500c0f6539cbef954b41b3128aecd1e76326708b196d64fb9
font_01_sfnt_off000070d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D2 10416 bytes
SHA-256: 6a42ebf3cf5a48bf352a829fc49e6788ad331791b99da4d0e4338492122e73a4