Malicious PDF — malware analysis report

Static analysis result for SHA-256 893043b5668c5565…

MALICIOUS

PDF

41.5 KB Created: 2020-10-03 23:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c9e43551c59246446fc4685b784968b8 SHA-1: 95f8356fb45a5f814e612ae13ef52b28b288d212 SHA-256: 893043b5668c556513a5e822f32ce3fe4ab3b2d366f1186ab375b6bb40501c48
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://ggtraff.ru/strik?keyword=i+pilot+remote+control+quick+reference+guide In PDF document text
    • https://site-1040427.mozfiles.com/files/1040427/wifigov.pdfIn PDF document text
    • https://site-1038395.mozfiles.com/files/1038395/vekiderogogolodesib.pdfIn PDF document text
    • https://site-1038694.mozfiles.com/files/1038694/94426194422.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/70179412552.pdfIn PDF document text
    • https://site-1038971.mozfiles.com/files/1038971/95252465704.pdfIn PDF document text
    • http://files.diaolab.org/uploads/1/3/1/8/131856266/224dd5cf67ecb37.pdfIn PDF document text
    • http://files.fctnbombers.com/uploads/1/3/1/4/131454932/milakisasururofiwe.pdfIn PDF document text
    • http://files.perryyoungblood.com/uploads/1/3/0/7/130775402/ginefiredesi-dekeradev-niwirojazuvagow-dedudur.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/1/0481/3268/5991/files/28396447261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/sm-j337v_frp_bypass.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5525/5204/files/wonokaremexewot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9911/1070/files/kufomevewizoratezeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9818/0258/files/lufexelamege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1668/3171/files/understanding_post_tonal_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6920/6435/files/trig_identities_calculus_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7665/8087/files/91050286870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1793/2437/files/best_buy_apple_charger_cord.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_off0000633d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633D 5216 bytes
SHA-256: 56c20925c9beae014a7d6c49802e09590bde116940a7861e986a83d481ea9568
font_01_sfnt_off000074e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E5 10552 bytes
SHA-256: 07369f227cd6a76dcda21fe565aafe12d6f917db95ac1a552a7a732f7ed1bbf8

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