Malicious PDF — malware analysis report

Static analysis result for SHA-256 6693acf08695a176…

MALICIOUS

PDF

75.3 KB Created: 2021-02-11 22:20:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2a4d3e0c656194d5d0fbeab1ea88d17d SHA-1: 56289ca50d2c6ca2bf00b9d9c9c574b128f6ddc6 SHA-256: 6693acf08695a176373d5cd438f8e82ec9591aad7a82a98cdb97a83b387944dc
156 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a Minecraft-themed lure. The ClamAV detection and ML classifier strongly indicate maliciousness, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

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://druttle.ru/123?utm_term=minecraft+beta+texture+pack+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413119/normal_5ff2676a0e564.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/JShfJ1I/24394835066.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/jftgigg/zamazomi.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopijaku/jeKidhe/photo_on_birthday_cake_apk_download.pdfIn PDF document text
    • https://kuvitarige.weebly.com/uploads/1/3/4/0/134095916/fekuxewati.pdfIn PDF document text
    • https://bunofavaluz.weebly.com/uploads/1/3/4/6/134661637/5080371.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/Nge5Jnf/air_traffic_control_system_failure.pdfIn PDF document text
    • https://cdn.sqhk.co/bujedebi/Shd2fjh/video_status_song_download_punjabi.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sigobija/61026421379.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/potijadasexevalikuwol.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/24971948686.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/77560608238.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/aidin_salih_gerek_tp_kitab.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/dujorebu.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/nunijibarimozemoxowake.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/android_programmatically_update_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/46762287017.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/10881325675.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000d449.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD449 14716 bytes
SHA-256: cc1d5f66b282e066c9f53f1a76f481c35380f490bc58cf19c7a1559683ba4536
font_00_sfnt_off0000c1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F6 5340 bytes
SHA-256: 7dfdca3f9ddeb0c1fc6ab9a48f290a64073c6b3c862c35858984eff55cfc87dd
font_02_sfnt_off0000fcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB4 10212 bytes
SHA-256: 9deb1d5cee817d47d6837129353c30e6ce55e119d5643608c5714cc62adb0209

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