Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60f81d3eca46d2f…

MALICIOUS

PDF

82.9 KB Created: 2021-03-21 10:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 734d0c3b153dbaaa89efbc9d5a747f33 SHA-1: 7daa7d56dd377f2aaa2d4c089316adf869241cc5 SHA-256: a60f81d3eca46d2f8a53faae14be0a76380d6b609361f19d3127ef7a38779205
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it uses an image lure to redirect users to a phishing site, likely to trick them into downloading further malicious content or revealing sensitive information. No scripts were extracted, but the PDF structure itself is indicative of a phishing lure.

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
  • 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://jottigo.ru/wix?keyword=from+pole+to+pole+video+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/kisesawaropo/6gc7hap/galaxy_on_fire_2_mod_apk_data.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413703/normal_5fcd19506c102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447914/normal_601e02f6899d5.pdfIn PDF document text
    • http://wifisef.medianewsonline.com/sixugelija.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/gihmVhf/noniwegofiwaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_5fd2f21cdc30a.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/6OheyWF/painting_per_square_foot_cost.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405950/normal_6033f824bbb5f.pdfIn PDF document text
    • http://bitiwiz.medianewsonline.com/sf6_circuit_breaker_abb.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/03950f24-26c1-47e7-80ce-9541a1944da8/33024752526.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/atarashii_gakkou_no_leaders.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/liwujogigi.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/zomivuwolajazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd5fa16-f447-4051-ac1b-6bf10de3fbcf/bmw_navigator_6_update_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/aiseesoft_video_converter_ultimate_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a487c46f-9d34-40a1-b38f-1a284505d807/chuck_c_a_new_pair_of_glasses_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd3a7fe-ed57-48de-88f3-885444748660/mijux.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/warhammer_40k_index_or_codex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7df814e5-9e6e-4360-ac87-0d7d6fe94dd0/foxepudevujoxexowanopid.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 5368 bytes
SHA-256: f2f1a400e012c565d7ac1bc85b8137f8069c727dbc727fcb2cf3ce92b66a863b
font_01_sfnt_off0000ff32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF32 11828 bytes
SHA-256: d9ba0e45d57a821f1561d9caa3bf9749a9a3c28ae8eaf16d0b890f31524532ef
font_02_sfnt_off000127ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AB 16520 bytes
SHA-256: 3c50a202d5be1a23906e7e5491eb308b05c17699f6850ef014f2378c12e81411

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