Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea3d58b4b68306b…

MALICIOUS

PDF

48.3 KB Created: 2020-10-11 06:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4ea72b0d20fe65f38341f809fdea6438 SHA-1: 23d7758356e2c01b1c6fd10a1d0d89ba803a9305 SHA-256: 5ea3d58b4b68306b77eff064eccb542967243a5dbe7f688a4e521fe4ba565f9a
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://ttraff.cc/pify?keyword=plants+vs+zombies+xbox+360+multiplayer In PDF document text
    • https://site-1041074.mozfiles.com/files/1041074/piditumawarolowamiwu.pdfIn PDF document text
    • https://site-1039893.mozfiles.com/files/1039893/76492188031.pdfIn PDF document text
    • https://site-1039800.mozfiles.com/files/1039800/woxumoka.pdfIn PDF document text
    • http://lixaref.rmwle.org/uploads/1/3/2/6/132681579/fuwuzilofiledopu.pdfIn PDF document text
    • http://files.raecounselling.com/uploads/1/3/1/4/131408008/8746671.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4674/3449/files/pixigomiwawij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3223/4142/files/rudy_cant_fail.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3520/9127/files/kigemezozatas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6909/3541/files/gloucester_county_4_h_fair_gloucester_county_fairgrounds_july_25.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5863/8247/files/ziputan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9266/3702/files/free_fire_gems_generator_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2658/7549/files/changes_that_heal_summary.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_off00007dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC6 5848 bytes
SHA-256: 079ed1fbd3215c03568d3618b26743a3be1ecc31bd4986d608b0d8f30bbff1c0
font_01_sfnt_off0000919f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x919F 10192 bytes
SHA-256: 77a8c6d80ecbe3e1ccafec1afe54c2b261a971dec21f831593aaf3a721e56cfb