Malicious PDF — malware analysis report

Static analysis result for SHA-256 802864af5539cf52…

MALICIOUS

PDF

55.1 KB Created: 2020-10-28 16:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 704a1ce2067803509d4db664c1368721 SHA-1: 1ec03076836bf41da32d45596c4550fd0ac02a7b SHA-256: 802864af5539cf522aa7344c5bc7162bfd889141d974b24b59eddff7d5db0562
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?keyword=melissa+stevens+the+sex+delusion In PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/685992a87e3194.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/novovuxosijuzuz_wofabunutigepuw_dugulelura.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/mezevoxinokimuwamibu.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/dojab_dubinojodofe_nuwafofewugadug_faxodu.pdfIn PDF document text
    • https://gavawujag.weebly.com/uploads/1/3/4/3/134370084/8040336.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/1365943.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/kovunikol.pdfIn PDF document text
    • https://liletizotefos.weebly.com/uploads/1/3/4/2/134234842/49fe1121a4c2.pdfIn PDF document text
    • https://lebuwaner.weebly.com/uploads/1/3/4/4/134478239/4075238.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/1ce0597.pdfIn PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/46ce80b10ff.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/9616268.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/409892.pdfIn PDF document text
    • https://tunomofezu.weebly.com/uploads/1/3/2/3/132303147/e22fbb.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000096fe.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000096fe.bin)
    • https://s3.amazonaws.com/nowokil/9_pointed_star_angles.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/83481466922.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/baserunning_drills.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8354/4772/files/chicken_shawarma_recipe.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/67667250807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6637/9425/files/how_to_draw_a_rhino.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/maths_functions_formulas.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/diabetes_miracle_cure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8761/3096/files/70000584603.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/free_newspaper_article_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/essentials_of_clinical_infectious_diseases_second_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/naruzaxuzimesaroxuzol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5294/0968/files/dotiladot.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 extracted file (font_00_sfnt_off000096fe.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000096fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96FE 4948 bytes
SHA-256: e8a36c282080a560ce196dbd30d3bec5c5960fa2de5c200a923dc84d8f032a5a
font_01_sfnt_off0000a7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E3 11324 bytes
SHA-256: e23fcbfb52253d42d642f1f096df116f54d40200983234ef35b0bc7a25afe377