Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad622c7b50cc5a23…

MALICIOUS

PDF

49.2 KB Created: 2020-11-03 18:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a95e747e23bc56006dc84971460077c8 SHA-1: d9cc65cb048eaf27a82294fc0adea0b5a8a1698b SHA-256: ad622c7b50cc5a2321a478c271f91fbab81138e2701ec5ae30351bb2cf311efc
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://ggtraff.ru/aws?keyword=wrench+mask+png In PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/wuziguxazus.pdfIn PDF document text
    • https://tinalolovini.weebly.com/uploads/1/3/4/3/134371967/wusifevebo-vowuse.pdfIn PDF document text
    • https://jelulepotaf.weebly.com/uploads/1/3/4/3/134383906/3122519.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/90368388234.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/vumexixinevifutigijiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/tv_guide_jackson_ms_comcast.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/jeredegebivenewudiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/20900354248.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/byron_katie_loving_what_is_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/blanchester_high_school_volleyball.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/32800592434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4185/5941/files/supprimer_compte_google_play_store_android.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_off00006da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA6 5392 bytes
SHA-256: 43abddbc3dd489d964806c1b9475efd3aa8be2cdfa6b07a915b93393bf6cbb62
font_01_sfnt_off00007fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDE 10492 bytes
SHA-256: 3a72ae21a7f8368d427ea2963fe95a7f095666d01aaefc8bec83249b08a61002
font_02_sfnt_off0000a398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA398 16096 bytes
SHA-256: 649e589086f59bf768427568bfd088e4890fbaea1d43ac699eb9d38e9bf53575