Malicious PDF — malware analysis report

Static analysis result for SHA-256 c119d3e09afd10fa…

MALICIOUS

PDF

80.7 KB Created: 2021-03-01 22:46:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4ae49be78aabf104715a91a744a323f1 SHA-1: 5c84aee879e4cd55e5bb35ed397cec4d11f11cab SHA-256: c119d3e09afd10faabb006dadd90c883b10b3594209f921888024d73ea7ffbe0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm designed to manipulate search engine results. One prominent URL, 'https://xezojetit.ru/wb?keyword=what%20is%20the%20message%20of%20the%20poem%20the%20road%20not%20taken%20answer', suggests a lure based on a common search query. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan payload delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/wb?keyword=what%20is%20the%20message%20of%20the%20poem%20the%20road%20not%20taken%20answer PDF link annotation
    • http://rukunikuxajosog.22web.org/can_you_ship_flat_rate_internationally.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/a_letter_from_birmingham_jail_quotes9zwnc.pdfIn PDF document text
    • https://pefeduvoxonix.weebly.com/uploads/1/3/4/0/134017609/boxavepa_magidawibekomoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rikaxusajojoba.epizy.com/how_to_tell_car_seat_expiration.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/waputunelitanolere.pdfIn PDF document text
    • http://zupotid.epizy.com/way_back_home_piano_sheet_hard.pdfIn PDF document text
    • http://zideniniwos.epizy.com/24969819696.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/army_photo_editor_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/fuliwifum.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/67822791884.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/barnaba_nibembee_video.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/89424866892.pdfIn PDF document text
    • http://memajale.epizy.com/bibekexi.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_off0000fee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE0 5592 bytes
SHA-256: 854301365529b1e2b35e2c0467ef58a22163dd79a13162fe30d7392f3357b423
font_01_sfnt_off000111d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D6 10456 bytes
SHA-256: 4f2e7b4d130d54b7088b5af081419449a9816167d6a2a1b2e6ee308e08ebb2c4

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