Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab02a6270f00b000…

MALICIOUS

PDF

71.4 KB Created: 2021-02-24 09:44:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a0030af338b11ce4420f8bef1fc2c984 SHA-1: e85ffd49715b1c78524ff06a5e0390520af0c0c9 SHA-256: ab02a6270f00b000438ab7b922f59e148292873b7c9c113df85d7a18680e17fe
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded links, many of which point to redirectors and SEO link farms designed to obscure the ultimate destination. The primary malicious redirector identified is 'https://crophysi.ru/aws?utm_term=me+before+you+vkool', which is likely used to deliver a phishing page or a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/aws?utm_term=me+before+you+vkool In PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/xowut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476427/normal_5ff302cc1eb18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484632/normal_602828e73a9f2.pdfIn PDF document text
    • https://lomapasaxanigef.weebly.com/uploads/1/3/1/1/131164081/eeccef3f5f65.pdfIn PDF document text
    • https://cdn.sqhk.co/dukapudubi/27ic2ge/88130922471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_601e23490a8f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417995/normal_5fe7980087d82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501045/normal_5ffb7c36da5d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5fe9965a56182.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/hhheShj/77398866698.pdfIn PDF document text
    • https://cdn.sqhk.co/kerosumumato/bdjdrdH/49190145071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_60344ed303e0d.pdfIn PDF document text
    • https://cdn.sqhk.co/talurelope/idHkhi0/my_airtel_prepaid_mobile_number_call_details.pdfIn PDF document text
    • https://dulowufokupi.weebly.com/uploads/1/3/4/4/134495444/musovege.pdfIn PDF document text
    • https://cdn.sqhk.co/pikuworano/hiihbig/como_descargar_power_rangers_legacy_wars_para_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/hcgeTja/monster_truck_show_memphis_tn.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/pizivurapab/vuxofakoxoletififatuxazat.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDB 4744 bytes
SHA-256: 78df5d7d3b7b4d9bbc16d3d2cca32a231dd86e1bdb70c5fcf8ade893dffe2677
font_01_sfnt_off0000ed2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2E 10556 bytes
SHA-256: d91621b295e49521c88daaafca0797f126625b5f2f0797425fada3a7014d563c

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