Malicious PDF — malware analysis report

Static analysis result for SHA-256 3854075c02ba3f03…

MALICIOUS

PDF

42.7 KB Created: 2020-10-14 20:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ec56260f4dda04f8ebb026f324da90a0 SHA-1: 256a4a13c0c000f1d0e48c9fceb1b08b7451eb9b SHA-256: 3854075c02ba3f032b3c9806ff0b6101e338f188419e11b005eb8f112a8424e7
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/strik?keyword=ios+on+android+software+download+zip+file In PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/xupowiradik_siraxelosekom_lafuwupov_tijazixalasifus.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/vunidixeviro_xitosujitupile_kadape.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/luguwef.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7775416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8709816e442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f8726af4ffba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f86f52b5482e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f8725f8ed5a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f86f75cc7134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8722697cf04.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/02f59914-4d69-4b77-a61c-44ab0e6b351e/valavik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d9eac2a-6edf-426a-965c-e59814140ebf/zazamozawezikode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dd59161-aa8a-404d-a76a-a250321990ea/mabitalususawusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec4abd11-1cc8-4d1d-8f70-cd420d50d01e/42363056515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4b18c1-8f08-4cb4-87d0-df2de2e76001/41889854010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8815/3250/files/14846421771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0471/0678/5430/files/86880741143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9808/8628/files/rureroduxagesaxatavisifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5282/6263/files/zisexaradiludatukedasog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7572/3971/files/where_is_area_code_33069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/698eed5a-dbd9-4877-9387-cca16fc8cf1f/37250539841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e03eb771-6839-4354-87bc-d444e09b5595/10914355183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d942398-0ce1-4d91-94b7-14ee72757cf3/90589540037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3af7068-476a-4a74-8a27-df92298c5919/puvefox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eed7a3f-a798-4fbf-91e9-c60479773ef1/rakaxewupewujutuk.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_off000067e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E7 5112 bytes
SHA-256: 890f569c5f98cab316afda10ea48b977f8f8cfe60104d0033b2f0c15d4d0cc8d
font_01_sfnt_off00007970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7970 10584 bytes
SHA-256: 4f093ee33087110004c48728002b2624b832de3c2792ffc5d23ba1d2858dc253