Malicious PDF — malware analysis report

Static analysis result for SHA-256 810d83980e159f77…

MALICIOUS

PDF

82.7 KB Created: 2020-07-14 02:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 58704dab6e3239195fd13148c4ba19f6 SHA-1: 18d4cd7b4e746de23a07f4cb97bd3a68b2735740 SHA-256: 810d83980e159f77afaf89cf716497af80af21321a44941a29889567291e4a2c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains numerous links designed to appear as academic resources, but they redirect to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a clear intent to lead users to harmful content. The ML classifier also strongly flagged this PDF as malicious, suggesting it's part of a phishing or malware distribution scheme.

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://ttraff.cc/wb?keyword=karya%20tulis%20ilmiah%20sosiologi%20pdf In PDF document text
    • http://files.art-asap.org/uploads/1/3/1/0/131070204/sopulowutenugifel.pdfIn PDF document text
    • http://files.houghtonsofyork.co.uk/uploads/1/3/0/8/130815093/7293a.pdfIn PDF document text
    • http://files.davidvitt.com/uploads/1/3/2/3/132302894/6a807cd933.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sotetusuveti.files.wordpress.com/2020/07/kifapazafegik.pdfIn PDF document text
    • https://regowom.files.wordpress.com/2020/06/nuvozewabagememegenaz.pdfIn PDF document text
    • https://gutagaperub.files.wordpress.com/2020/07/tuwulipuxetuk.pdfIn PDF document text
    • https://kilabizusu.files.wordpress.com/2020/06/nifog.pdfIn PDF document text
    • https://wazejiwifo.files.wordpress.com/2020/06/26294018977.pdfIn PDF document text
    • https://begogimem.files.wordpress.com/2020/07/lukurotixozovurun.pdfIn PDF document text
    • https://fesopalom.files.wordpress.com/2020/06/libojivubowiwom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/59979995904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/waxojinoxokamerunur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0936/7461/files/dedutipikimasobakosup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/pujutakevuvuneze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53978683100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/winusulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/vabuziw.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CA 5184 bytes
SHA-256: f4eb243e3d79cf3f0da34f615852c245429da77f56fc32c578dfb271867cbde9
font_01_sfnt_off00011a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7C 10340 bytes
SHA-256: 8055bdf576ece626747a6d6e6a39ade4d93cd76ed6d60b6fdcd5151f533b9c6c

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