Malicious PDF — malware analysis report

Static analysis result for SHA-256 62714841d06d4525…

MALICIOUS

PDF

38.1 KB Created: 2020-10-10 05:40:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: da2e7ebd1501371251825c11e8501533 SHA-1: f99ec7053d6b9603888d308bc22a418654af673e SHA-256: 62714841d06d45253b36d8a791481fcfbedf53822ebd5bd15442699e9c634afb
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/strik?keyword=red+car+game+unblocked In PDF document text
    • https://site-1042349.mozfiles.com/files/1042349/jidotifefafuwonaga.pdfIn PDF document text
    • http://bitemuba.jesspurtellyoga.com/uploads/1/3/1/3/131380183/kugapipegine.pdfIn PDF document text
    • http://files.vermontpiano.com/uploads/1/3/0/8/130815097/3740348.pdfIn PDF document text
    • http://sikud.legion22.org/uploads/1/3/1/3/131381924/7483791.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/1/0436/1905/7822/files/37942389962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/6140/1768/files/pusiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9226/9473/files/mimevedenawabale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4461/7885/files/android_cracked_apps_download_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0094/7103/files/43763912812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/8534/1348/files/luletabazegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3474/0389/files/gavadutarepobufefan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8864/2197/files/the_stinky_cheese_man_read_online.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_off00004a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A9B 5048 bytes
SHA-256: 770c65cff0d2bd65a99fd9e751712c7eab4a2220dbfa379771dbac3410d31c2d
font_01_sfnt_off00005ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA1 9932 bytes
SHA-256: dad95122dc19fb97ed78379d5b2cce5758401c957c53f5c1172ccaf93d67d1af
font_02_sfnt_off00007d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D92 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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