Malicious PDF — malware analysis report

Static analysis result for SHA-256 044df357156e79aa…

MALICIOUS

PDF

51.1 KB Created: 2020-10-16 18:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 0352efdaf2c2be1c80e07cbe49515a16 SHA-1: 5727537b6f07cac31a70e959a4541bdba70ba949 SHA-256: 044df357156e79aa2b60a85cbb8e9559fc6cd4e1b7e63a7758395ed424f2ac57
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.me/123?keyword=yahoo+japan+news+apk In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/4918653.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/739bdf.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/tepalepip-fevig-xakotifudugu-zadozog.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/665612.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/somulimezopomab-nolapuxoduvamak.pdfIn PDF document text
    • https://daputonekamipit.weebly.com/uploads/1/3/0/7/130775603/bapeweser.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4045700.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kirorafagosox.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/8452231.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/velukuziralijomem.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/dabe667b-29bf-4d6d-a48b-0fd61d658b0c/2099725668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ad0d6fb-0e05-4219-9a09-4b08b92fbaf2/61123127958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c74592-8f84-4020-9727-4e9269c4c547/56436202739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0370/8053/files/peripheral_vascular_system_and_lymphatic_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9857/3474/files/rukaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/tone_didls_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4073/7957/files/73546364455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4699/3052/files/metals_nonmetals_and_metalloids_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7398/2630/files/dream_league_soccer_real_madrid_kits_2014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4869/7493/files/fifitupimazopan.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9C 2828 bytes
SHA-256: eec2311198495a4bc353016469730966835d49679daeed18a98faa9ab15954d4
font_01_sfnt_off000075a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A6 4972 bytes
SHA-256: 521bb3e5ad47a08bc8eaab2e91489f280ed4f99075ea97bc13ea4067aba087c7
font_02_sfnt_off000086a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A9 9864 bytes
SHA-256: 8e64d69c528027d00752c21362a3b456ec3d8d2f1a75d6a847975455d0a69757
font_03_sfnt_off0000a8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A8 16364 bytes
SHA-256: ebf950f23748c965525db37ef3cfae8a7483448fbc082cb8311ff652916c5eb8