Malicious PDF — malware analysis report

Static analysis result for SHA-256 445e86244379c994…

MALICIOUS

PDF

45.0 KB Created: 2020-10-31 11:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 131659565674ed952710878cfccae406 SHA-1: 9450a88d08722d47d17f17533b58bf8bdc4c79c3 SHA-256: 445e86244379c9944a542fe0d6a3e8af5867032df5d9b6884fdd2ba4460fc5a6
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://cctraff.ru/aws?keyword=sweet+but+psycho+chords+keyboard In PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/8d82963.pdfIn PDF document text
    • https://vewusijonaw.weebly.com/uploads/1/3/4/4/134489037/ruzomajadefog.pdfIn PDF document text
    • https://fawubanine.weebly.com/uploads/1/3/4/3/134321827/8f95d45f677648f.pdfIn PDF document text
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/kixal_rumida.pdfIn PDF document text
    • https://nosadipopone.weebly.com/uploads/1/3/4/4/134470180/74fd83bcba.pdfIn PDF document text
    • https://jazexupojofon.weebly.com/uploads/1/3/1/4/131409098/leneturovaf.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/xobiketu.pdfIn PDF document text
    • http://www.opentle.orgIn extracted file (stream_005_off00006c7b.bin)
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off0000594f.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off0000594f.bin)
    • https://cdn.shopify.com/s/files/1/0481/3589/7251/files/amc_10a_2020_scores.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/60094359044.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/kupenelesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13160e3f-1788-4cbc-a222-b39bd9cf268c/the_secret_world_legends_factions.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/jumbled_sentences_exercise_for_class_5.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/iv_antibiotics_list.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://www.gnu.org/licenses/gpl.htmlIn extracted file (stream_005_off00006c7b.bin)
    • http://scripts.sil.org/OFLIn extracted file (font_01_sfnt_off0000594f.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00006c7b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6C7B 7228 bytes
SHA-256: e3661978629e80cf029a440df803e0a84d15b47534c50a89bbacb7960c18ea44
font_00_sfnt_off00004e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E78 3048 bytes
SHA-256: 0d6a7ac702cb9c8305ff8b77cfcf0472f356fb62e9ef5c5c1e7bbeb4f82beda0
font_01_sfnt_off0000594f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x594F 5628 bytes
SHA-256: 0fef664ed89148f292e9fdaa7c70d2dc83715f6597a6078a9deef79156e45b24
font_03_sfnt_off00007f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F79 12648 bytes
SHA-256: 7ea796d4468d2e174fbd2acfb129d10c27c302a033548d0827e472236f6fb177