Malicious PDF — malware analysis report

Static analysis result for SHA-256 174a29d8b92a8439…

MALICIOUS

PDF

40.1 KB Created: 2020-10-06 13:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1e08105dacb93dec23755a33c34d3927 SHA-1: a0e8b2aebba38e6792e451b4dcdb89ab212651c4 SHA-256: 174a29d8b92a843919d3c00c116bd44d2f4b459c1d4b179153c1a28cc8ae35dc
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=vedda+blood+sugar+remedy+pdf+free+download In PDF document text
    • http://gotilo.quackquackcolorado.com/uploads/1/3/0/8/130874118/0e2d5b50cf0473.pdfIn PDF document text
    • http://jonas.halfgodtactical.com/uploads/1/3/1/3/131383309/begenekasilil_juzel_lodesomakumu_rezafudovojepo.pdfIn PDF document text
    • http://tufomawu.nathanwitter.com/uploads/1/3/2/6/132680856/6996063.pdfIn PDF document text
    • http://kabuf.cosmicbabies.org/uploads/1/3/0/7/130738755/9588671.pdfIn PDF document text
    • http://files.businessbox.ch/uploads/1/3/1/4/131453536/nikugisogugiwex.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/1/0440/2728/1558/files/fijalewaredawiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/fuvozuvuvotuzuwakaweru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/wogomegarogagesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1698/5508/files/7777950945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e2b33a-2a92-4012-9511-90da45a7afdf/20116505228.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_off00005df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF3 5660 bytes
SHA-256: 523aadf6db13f817aa0edeadee0404beb8ffd7a19c2f8a93e1cc433f719a14f9
font_01_sfnt_off0000712c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712C 10128 bytes
SHA-256: 7fd5a03eaac1cc59fad547b1b34bf82df2d2886fadb81b263b44c0af752dc2a8