Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a935c0ae71417d…

MALICIOUS

PDF

91.3 KB Created: 2021-02-22 12:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 58bd007c4392ac0b54fe79435731e47b SHA-1: d2bb254b85c0d3f53191ebb4a47a7cc5c8b99796 SHA-256: 89a935c0ae71417d43c0581c58f332a1e7aee0f6d9e5c5949ab7f40b39a54126
176 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with the primary malicious URL being https://jottigo.ru/strik. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jottigo.ru/strik?utm_term=which+mobile+hotspot+is+best PDF link annotation
    • https://cdn.sqhk.co/fopeziriga/5OUaLaG/bleacher_report_liverpool_barcelona.pdfIn PDF document text
    • https://cdn.sqhk.co/kerosumumato/kgiQhfT/top_ten_viral_videos_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/jagojixego/hciiuXC/68839811544.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/nigmjiO/betubitun.pdfIn PDF document text
    • https://cdn.sqhk.co/tezabulaw/eckLjf2/venuz.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/ij8ibCD/harvard_business_manager_digital_marketing_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/jbjahdm/39671720038.pdfIn PDF document text
    • https://gurekageta.weebly.com/uploads/1/3/2/6/132695257/550ee5db1d.pdfIn PDF document text
    • https://gixunilaw.weebly.com/uploads/1/3/1/8/131856646/2665f.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/dhjhi72/negan_the_walking_dead_iphone_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/EnPibhg/the_bowling_family_singers.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/wujixus/41862248135.pdfIn PDF document text
    • http://rupeguv.epizy.com/imperative_exercises_elementary.pdfIn PDF document text
    • http://mukonedes.epizy.com/best_college_algebra_and_trigonometry_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/exponential_function_word_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/gaxazuvajixesoz.pdfIn PDF document text
    • http://rokodejufoda.rf.gd/astro_a40_headset_manual.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_off00012794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12794 5020 bytes
SHA-256: 59d48554236c1c69b35e2fee522b50c58ecc58b435b60d44905a6f274025ecb6
font_01_sfnt_off00013892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13892 11628 bytes
SHA-256: dd7a27a29152599f743820e09e4b30ee711bab218e395f64197df3330dfbba6d

Open this report in the interactive analyzer, or submit your own file for analysis.