Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e55667e3088fb29…

MALICIOUS

PDF

80.8 KB Created: 2021-05-24 11:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e8fe257a3b49daea3d9ff98ea725a77d SHA-1: 7db02cdbf9fb09c4f14808fe7c348f852aad9c2e SHA-256: 1e55667e3088fb2907942eda848a8d2d9c78f7e5d91c7eb10ae1e4d942118e24
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it's a phishing lure, using an image to redirect users to an external URL. The primary URL identified is a redirector, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and URL analysis strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/strik?utm_term=what+is+correlation+and+regression+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455179/normal_5fca989ca6aa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451023/normal_60161d1c5da6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376120/normal_5fe1195ff34c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449777/normal_603b8008bfac2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_603c3487ab5cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391001/normal_5ffb14524719a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484358/normal_60671b6a08a5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486036/normal_6032d0080d7a0.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/fac10349-85d6-401f-9a3c-31816e1704bc/94320274784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/364478f5-73fd-48c7-ba92-f555f97b75ed/gopro_hero_3_plus_silver_battery_life.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/8932835985.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/mosukobobizogeweres.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/video_software_for_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/73982615106.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/timidovesita.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/29421036710.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/emulator_android_yang_ringan_di_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/primed_to_perform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6c526cf-562f-426b-b67e-295eabffe030/kidde_kn-coeg-3_recall.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/dragon_ball_z_chala_head_chala.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/95647648871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab55679a-3c0d-49e6-a393-a1f0da2fd92e/la_la_land_kalimba_tabs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c01b546c-ffb0-4548-8bfa-c1797deed2c7/salman_rushdie_satanic_verses_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de734ac-3a08-4417-addf-2359ef2171a7/drawing_techniques_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c73729-c7fa-427e-8db4-36b82aefddd0/schlage_camelot_user_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_off0000fd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD59 5432 bytes
SHA-256: 26746f72b72e923bdb92b6a220191c7b42209198e4c904e04a3b23987fa166d3
font_01_sfnt_off00010fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD9 11060 bytes
SHA-256: ec5116f8a8ce94b0ba0c40dd1407763a202f441d68b51dfe5be5652713f74ab1