Malicious PDF — malware analysis report

Static analysis result for SHA-256 701261cfbb34f414…

MALICIOUS

PDF

59.1 KB Created: 2020-10-16 08:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 154f736e82b26333629a9b27ab985adf SHA-1: d4ec9b92808a044704cee3d597e52dac14f973b1 SHA-256: 701261cfbb34f4144c358783d3744275cd548538d299378ec22226d530a23b9e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=kitab+al+fitan+arabic+pdf In PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/e4ee021829280.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/zapawok.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/nunenemajewejawiki.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/b55817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f873cd4e56e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f890e01b65ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f88d47c2a624.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3532345.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/xatuxuz.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/purosudabugifoduxad.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/bototex-tesibolutad.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/fejokovugoze-vuzanara-gobopovo.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/d8b6b404-fd88-487f-b470-151b169a278d/dabekuvumoxuvimifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0c5660a-4c6d-478e-953a-1bea8aaed50e/75930274056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8134/4199/files/15570911836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4937/2826/files/12452204232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3293/2252/files/35245691946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4473/2580/files/cash_received_from_customers_direct_method.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/what_is_m1_in_ironmania.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2600/1315/files/tesepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3933/3786/files/88305226136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8091/8211/files/christian_advent_calendars_with_chocolate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8285/8144/files/parts_of_speech_6th_grade_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/94690110446.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000833c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x833C 5080 bytes
SHA-256: b420d8670ac72688594c91ee63bbc4824b3761587f714d3dd19266c961eba638
font_01_sfnt_off0000948b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x948B 10920 bytes
SHA-256: 067d4de108cc538f6f159a2ba52bf09857f71caed54871b918af0684f94cf6c8
font_02_sfnt_off0000b98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB98C 20704 bytes
SHA-256: 6a269022ec82e7cd5044bb73b9651df16f5bb0cb45537221db44c59eb88b322c