Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbba35d89dfd37c7…

MALICIOUS

PDF

79.4 KB Created: 2021-03-16 23:24:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 747fe865867266e627ec64aefa793651 SHA-1: b31fee784081623a5c418a3ce37a6b8f6e8d8c87 SHA-256: bbba35d89dfd37c754262c9443478ef28530e56bdca5a2b6af7c96e394480a39
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is classified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with at least one, https://jacksth.ru/123?utm_term=asiandate+apk+mod, appearing to be part of a phishing or malware distribution scheme. The PDF structure and embedded links suggest it's designed to redirect users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/123?utm_term=asiandate+apk+mod PDF link annotation
    • http://pannochki-art.com/sakezamedoborepimeveurayd.pdfIn PDF document text
    • http://tuzupibu.scienceontheweb.net/lularapitafuwuvunupopa.pdfIn PDF document text
    • http://myyshooop227.site/54458316355shttv.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/audio_driver_free_download_for_windows_7_32_bit.pdfIn PDF document text
    • http://begetus11ppz.xyz/email_signature_disclaimer_template3l1jn.pdfIn PDF document text
    • http://zusiwibewire.mypressonline.com/17467333907.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dajidagetulawu.epizy.com/bahubali_3_full_movie.pdfIn PDF document text
    • http://safinemawexow.epizy.com/lenovo_g50-80_laptop_wifi_driver_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a2e9ee-9917-4527-b560-d02776f3b834/dawavipusifelir.pdfIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_0ccaadeefc7a44af9442657fb7fc345c.pdf?index=trueIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_67ea4708a49347dfaf5a886bd9345a01.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_ee08c1fe42204f54814d007197fa20c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a259e9-3053-4bba-a50d-c368501e1075/wotujaziru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16eb2708-88e7-4ca3-bd35-be86c278dcb3/lifetime_54_mvp_portable_basketball_hoop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446616a5-b913-47eb-92e4-a74cea3eb515/75080641032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fad8c6d-3eeb-4485-82b9-8d112a56a86f/43179517359.pdfIn PDF document text
    • https://5057b38b-f250-4925-a5fd-2dbc054a2c1f.filesusr.com/ugd/25ee37_1b57566e092443c0a716ca2edc87e916.pdf?index=trueIn PDF document text
    • http://vujegojuxuwu.rf.gd/66508539081.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_4f63d9094549422791a54ac8f0b2aa58.pdf?index=trueIn PDF document text
    • http://lovofazojoj.rf.gd/autocad_crack_32_bit.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_off0000f875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF875 5032 bytes
SHA-256: 82d368dc869833648cdaa4958eedfcd672b606c737421e6a8f3ef25e73806615
font_01_sfnt_off00010987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10987 11536 bytes
SHA-256: 15304f795e8af76c4a79cf0b41cf54f5d386f63d9788029d4f9a42da1019c27b

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