Malicious PDF — malware analysis report

Static analysis result for SHA-256 03fb20a651df1386…

MALICIOUS

PDF

79.1 KB Created: 2021-05-27 11:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8f8fd4735897e38056893ba8670e69d0 SHA-1: a8b12ea0daa9c267712110f64d0064da4f24f9ac SHA-256: 03fb20a651df1386a21ade9f9e101795329d141536345937faf95722e8ac2a8f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://lozipotod.ru/strik?utm_term=9.s%25C4%25B1n%25C4%25B1f+%25C3%25BC%25C3%25A7gende+alan+sorular%25C4%25B1+ve+%25C3%25A7%25C3%25B6z%25C3%25BCmleri PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443326/normal_60328938b4e9e.pdfIn PDF document text
    • https://nanuleseja.weebly.com/uploads/1/3/4/0/134012971/zelolopibole_vugapudifa_jerumudowuninil_zomajetufu.pdfIn PDF document text
    • https://pamibatofenowa.weebly.com/uploads/1/3/4/5/134525539/vatujixurisenutira.pdfIn PDF document text
    • https://xusuzipurojovup.weebly.com/uploads/1/3/4/3/134325257/kibugowozopivudiwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455387/normal_60281bcf7edc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418565/normal_601dd956cf0a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476780/normal_5fe5bda8d03ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425227/normal_605f4e0bca5a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418000/normal_5feece8cdd022.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453102/normal_5fe3ad6f7a378.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d3cf0a00-ed85-4646-a44b-6cc5d29f4663/rakago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c7ec24-bc86-4828-9ae8-02203a9c64fe/lisa_simpson_myers_briggs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ffc8023-dee6-4deb-b618-0cffcf642434/nubejozevutubudapipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c4870b-09fd-4b73-a0e8-07fee1b4cc6c/fight_club_consumerism_movie_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f11997-499a-4893-a073-dec4feea5206/toner_for_hp_laserjet_1320n.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8954df71-d5d1-4d08-b335-eb1c1d38aa8f/nujorogovedolen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33db758f-873e-4eb3-9cf1-1dd2642849b3/25723241142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a29fce8-0ce7-48dd-92a0-995fe40539e2/operations_management_nigel_slack_9th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c55ed18b-5ae6-402c-9845-bfc5aed6af90/hp_stream_11.6_inch_laptop_review.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64D 5704 bytes
SHA-256: 0ffa1b34d223d3ac82fbf1f71b68c09aec6f62aa46486f949e11738f9a80d62f
font_01_sfnt_off0000f922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF922 12144 bytes
SHA-256: 95126d2d8e7efbf7f3284e1f80873d3cfa2d46935549ea43e12e7de13e07a7a6
font_02_sfnt_off00011eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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