Malicious PDF — malware analysis report

Static analysis result for SHA-256 4410e12b38cacb10…

MALICIOUS

PDF

78.1 KB Created: 2021-05-25 12:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4e0160f1c49f71695bc7f6f43d87f28e SHA-1: 58aff7daa61c7d45a912785aa3f314d2ed8a325c SHA-256: 4410e12b38cacb10da5d92aa367444ce66a1c27053c151f510873c75ae2ffb73
136 Risk Score

Malware Insights

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

The PDF file contains a high-severity heuristic indicating it's a phishing lure for free downloads, specifically mentioning 'Photoshop touch apk latest version'. It also includes an external URI pointing to a redirector URL, which is a common tactic for distributing malware or leading users to phishing sites. The ML classifier and ClamAV detection strongly support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=photoshop+touch+apk+latest+version PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384039/normal_5ffd4b29685db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506170/normal_6064591b6830d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454290/normal_5ffca38a9c064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_6037af877645c.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/d0f5de26-5b7a-484a-9335-eb4471093810/54743928063.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/73293905185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafa0afb-3137-45ee-961c-18d7ff58a8ed/66271578780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c1678b-1225-4399-bce7-f5aeb0c21cfc/washington_state_department_of_health_contact_tracing_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a27b0fc-ff52-4591-9996-355405ebfe2e/roxeralematemudodipovo.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/zoladosukojurevitisobas.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/60077613318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63572908-1bb5-4f14-8757-b79484254221/mind_power_seduction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/chipak_chipak_songs_naa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1b086a5-d818-4875-8764-79083fb56698/72890294518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df410c6-3506-42be-b26d-ab2d34fbb9ec/fender_twin_reverb_65_reissue_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/8274807041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5506e9-5d29-4c1b-b15d-bb891a4a743b/three_day_potty_training_method.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b529eb-5418-4eb6-8501-92e46189b864/are_james_allen_engagement_rings_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c6e42b-b4bf-42d5-b6cb-9489f17b36cd/william_blake_the_lamb_shmoop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09d54f6-cf43-4f9c-a452-bb9f894ed780/terapia_cognitiva_conductual_o_psicoanlisis.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/newodixe.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_off0000f557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF557 5144 bytes
SHA-256: 24093b32235cc415efbe13b61716a4485f90337c213e2188dfc0c303cf08d407
font_01_sfnt_off000106dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DC 10900 bytes
SHA-256: 5e7ec7f3720d5f74cc9098557347769b3416845454b82ad62f3bb7c2438a1e54