Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08036cb4d140abc…

MALICIOUS

PDF

80.3 KB Created: 2021-05-09 22:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1fd95840b98990ea480a6140b49e8ae8 SHA-1: ed78cef78600988b26977b95c704ccf1e6071031 SHA-256: e08036cb4d140abc0078cdae1e8247952b5eaa32393b1779742afcab863a45fe
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm or phishing operation. ClamAV and ML classifiers strongly indicate maliciousness, specifically classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://zajinet.ru/strik?utm_term=what+is+the+chemical+formula+for+sea+water+joke PDF link annotation
    • http://weareanonymous.org/bluestacks_apk_dosyas_ykleme8jzdc.pdfIn PDF document text
    • http://m-laskin.ru/summer_waves_elite_frame_pool_reviewsw1fqr.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://s3.amazonaws.com/kosipefojaw/veguzofezawo.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/83520817568.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/2432373315.pdfIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_01b362c4ced848f3b747405346ff5003.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a76e25e4-b7ed-4b84-9dcd-1cf55280cde6/frigidaire_ffad5033r1_50_pint_dehumidifier_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/chalo_movie_full_hd_video_songs.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_59d37c4d14ec47279a7f41379eddbe47.pdf?index=trueIn PDF document text
    • https://c38d9960-f3a4-46a0-b266-cfc7836dd0ed.filesusr.com/ugd/a8d9c8_f77ea0cc3b6b411987323b3fe2482b37.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdbb95da-9dfc-4f30-9466-131cae4516d0/rugumekajem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeddc59c-0d0b-4188-9710-3bc575698a06/autocad_trial_version_2017_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/intensive_care_society_guidelines_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/australian_stock_market_news_now.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_ba59e0271a4a4ec89766d0aa4d01c046.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87214e8a-d25a-48f8-bf58-7ffe4e1bd6a7/what_does_ka_mean_on_a_cobra_radar_detector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b86d7697-caec-4c81-86cb-64dad11f29be/99771102563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d120b46b-b338-4ad8-8c99-b77370f8fe5e/is_hp_photosmart_c4780_airprint_compatible.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/importance_of_kinetic_energy_in_our_daily_life.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/tekij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE4 5140 bytes
SHA-256: ae2e8987a07eff51b22c11bb1888bc6cc5dbe7bf68c961d68029b55eb915702a
font_01_sfnt_off0001017a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017A 10608 bytes
SHA-256: 5b747edff7d294a67c26b0165832a01d435e74f1b1c58330329b8a7363077f48
font_02_sfnt_off00012582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12582 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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