Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b45d70182707325…

MALICIOUS

PDF

43.9 KB Created: 2020-10-26 03:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 79b00b1dcb800b8fa78653a0f6d1f25d SHA-1: 4b79e9fc44d4ec7576355578b11aee78fcf08e70 SHA-256: 6b45d7018270732559a4878b5f57e27a66ce70002fca3afcad6038b70abc99ee
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://gettraff.ru/aws?keyword=bukhari+shareef+hindi+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_5f8807453173c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_5f8e3b3307a4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416934/normal_5f9600f6d1900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f896cfa126a5.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/5aaddbea.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/288e223a.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/b2a07.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/nofaganunexur.pdfIn PDF document text
    • https://vejuvofarazaxar.weebly.com/uploads/1/3/4/3/134355137/wuzefo-fiwipusegolot.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/9a061106-0c2d-4232-ae1a-16bf08ea1b64/latest_nepali_movie_songs_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/8830829308.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/rikakufor.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/49713733127.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/antrenmanlarla_geometri_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/xevepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2945/8852/files/firamasugivuxedukinorona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1347/4984/files/jodetuvotovofilevun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5581/6090/files/harry_braverman_labor_and_monopoly_capital.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0752/7077/files/38456940764.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_off00006d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0A 5336 bytes
SHA-256: 3d43429221c1341b06d6dd1583f3078e4d96a69d664a64993917549060dba9c1
font_01_sfnt_off00007f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3D 10312 bytes
SHA-256: b17b94d9b2aac3838108bde243fe3b94ba449544307610bb5b8d5241fbd95f99

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