Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4b14f907e3722d…

MALICIOUS

PDF

42.6 KB Created: 2020-09-13 05:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9aba3304c435e848f690b4788abc0113 SHA-1: dc45fee962451e7ee45105331f797be9e5dfc286 SHA-256: be4b14f907e3722d9271232c18a3a3e01aed66c99a47a305fb404ce3a7df0d9e
234 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.link/pify?keyword=turner%2527s+graph+of+the+week In PDF document text
    • http://files.aepministry.org/uploads/1/3/2/3/132302963/lupinorofox-towezano.pdfIn PDF document text
    • http://files.emilygoldbergchicago.com/uploads/1/3/1/1/131164153/rixobaveb-rorel-jopom-rebuvorezoviz.pdfIn PDF document text
    • http://files.shopnonstoptuning.com/uploads/1/3/1/3/131398097/3472600.pdfIn PDF document text
    • http://bogukowo.c2cnys.org/uploads/1/3/0/7/130740450/1857048.pdfIn PDF document text
    • http://nebexa.rachelscala.com/uploads/1/3/1/3/131380485/2d5b40acd2aef38.pdfIn PDF document text
    • http://files.rheumatoidarthritishealingnaturally.com/uploads/1/3/1/3/131384279/fosesige.pdfIn PDF document text
    • http://girafen.pvvikingfootball.com/uploads/1/3/0/7/130775923/vuvopegafetas_xinebukukitiwax_bamed.pdfIn PDF document text
    • http://files.losamigoshosteltenerife.com/uploads/1/3/1/4/131437806/rulilerevowugav.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://static.usrfiles.com/ugd/e2a635_244883cbf8354f839eae3672c43e2a0a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/978dd5_b597edb60f274f4a9654181afe9daae8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/097bd5_7c69e017060448e3bd9cea81bd79fccd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/89363e_dc703fd224884ae4ac7bcf3ae7b1b26e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/78daac_eaab9d6ed8a047ec9ebfa5ab45ebf47a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gowavofopinesifaremoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/zikajaxewumukugozusos.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_off00005a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9A 5104 bytes
SHA-256: 8bb748c9ccce5d63c493ca7364ae44fad236ca3e23d7d34832a821df561f7790
font_01_sfnt_off00006c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C02 10424 bytes
SHA-256: bd28faeb6e92466cb82eac8422c7326f1f03dc2c493a07c8ea9f622b124709fc
font_02_sfnt_off00008f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F91 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2