Malicious PDF — malware analysis report

Static analysis result for SHA-256 a44e3e38c90cd0a9…

MALICIOUS

PDF

42.3 KB Created: 2020-10-08 00:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c88d80f06de1691190f671621ab3c0c4 SHA-1: 190f23ca6b9da98b9550e181f051aeb3353c4204 SHA-256: a44e3e38c90cd0a93893d230c5bcaed22d8b3706f0280e5bb5618f940854f571
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=salvese+quien+pueda+pdf+download In PDF document text
    • http://files.keppelcoastcameraclub.com/uploads/1/3/0/8/130874530/bipipafowunetoxeminu.pdfIn PDF document text
    • http://kipilu.goldencoastbailbonds.com/uploads/1/3/2/7/132712237/valojamivaxoxi-puxenox-mikunifupekuk-luvumag.pdfIn PDF document text
    • http://files.annapurnasriram.com/uploads/1/3/0/7/130740538/6af560d519.pdfIn PDF document text
    • http://mafinon.transactionbankingacademy.com/uploads/1/3/1/4/131483152/8ce7755c.pdfIn PDF document text
    • http://files.italianleatherrestoration.com/uploads/1/3/1/3/131383942/c0b67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbb2700-ef49-42ff-935b-6e1ee4d7833b/xefimid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b25cae7-078b-4764-bd38-24df697dc17d/28501376042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46f40a18-df0c-4544-90bb-e1bc36c9ea92/davegunolelutebaperubijiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac944abc-a24e-43ca-b515-36c243361fd6/35654398087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff0e6aa-493d-46d8-abe0-3087c3cf38cb/47676094152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4959/9644/files/jozukawunefed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/nirurujonuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0551/2349/files/togainu_no_chi_lost_blood_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/43338396772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1480/6440/files/fiskars_tree_pruner_rope_change.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9170/9092/files/social_inequality_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9282/3204/files/wish_promo_code_june_2020.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 8

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_off000059a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59A0 5320 bytes
SHA-256: 413e9d3cac9985c394409a45f31add5b14eadb6a31ba0343d62ab38fc345cdaf
font_01_sfnt_off00006be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE7 15428 bytes
SHA-256: 086396cbc01cc3f463ebfa2678f7b83b0e2a601c1156e34a863f26403a2f1010

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