Malicious PDF — malware analysis report

Static analysis result for SHA-256 12494dd70a685ef3…

MALICIOUS

PDF

41.0 KB Created: 2020-08-07 09:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f8ce7b24efc6a8b8b6d9dcd021c443b4 SHA-1: 2113313c6d83397cb2aa9eef5565dea32293e0fe SHA-256: 12494dd70a685ef366c77769f67ce74228ecbe77843a1735cc712add65e86612
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://ttraff.cc/pify?keyword=calfresh+application+spanish+pdf In PDF document text
    • http://files.paulsonproductions.com/uploads/1/3/0/7/130740128/6574175.pdfIn PDF document text
    • http://pilozot.divinewordseminary-riverside.com/uploads/1/3/1/8/131871721/jaxibepabajupe.pdfIn PDF document text
    • http://files.waveneysecurity.com/uploads/1/3/1/3/131380107/d2ba5bb19.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/1/0430/9755/5093/files/72978212589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/26037665464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/fluid_catalytic_cracking_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6471/1575/files/97376653320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/budozupizusirukorapig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5951/0424/files/lamufevuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7850/6904/files/13432831048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5731/4977/files/85626274505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9354/7424/files/block_launcher_pro_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/18940753989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/rovol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/4757/9811/files/bpdu_guard_and_bpdu_filter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6094/4296/files/pugalenudi.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_off00006217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6217 5148 bytes
SHA-256: 866ebfd50fdbba770d5d8b8826c074320b98b0ff9d9c636e4dd93382d1613c9a
font_01_sfnt_off00007395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7395 10352 bytes
SHA-256: 7f8d9b1c227da1503de765d64fc6b1bc9dc8eaf90d3ce827cfd4563a19f30657

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