Malicious PDF — malware analysis report

Static analysis result for SHA-256 034322f6884833fd…

MALICIOUS

PDF

76.5 KB Created: 2021-03-25 00:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1716f83e90742533ccf65c50cbe3f4e SHA-1: 629858d9983241b66ca3917966cd337e24c34303 SHA-256: 034322f6884833fdf9bafa6c5a591b27b7fd1877d9ef7ee6121631e7b0a0aef6
156 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV and a machine learning classifier as malicious, specifically as a phishing or trojan. It contains numerous external links, with one heuristic identifying a 'PDF_SEO_LINK_FARM' pointing to 30 external PDF links, suggesting a large-scale content farm for malicious purposes. The document body, though heavily obfuscated, contains text related to a 'Forerunner 235 manual', indicating a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=forerunner+235+manuale+utente
    • https://cdn.sqhk.co/welosezu/lhjY9hj/the_wrong_roommate_trailer.pdf
    • https://zebomutob.weebly.com/uploads/1/3/2/6/132696512/50ebd94.pdf
    • https://cdn.sqhk.co/torazanopuni/ignZghB/forensic_accounting_for_dummies_free.pdf
    • https://cdn.sqhk.co/xusorawoka/aPhiifD/merchant_services_intuit.pdf
    • https://cdn.sqhk.co/towevefizub/iaIjhbB/cut_off_time_in_spanish.pdf
    • https://cdn.sqhk.co/litonesi/mShh8ji/zapopifuweturafelozefobe.pdf
    • https://cdn.sqhk.co/sifalavuxozo/hQgfGm3/wenizuluxozodemisodof.pdf
    • https://daxuvinu.weebly.com/uploads/1/3/2/6/132695190/9561806.pdf
    • http://vagoneviwesum.66ghz.com/dbx_160_compressor_limiter.pdf
    • https://pifaxatopegamu.weebly.com/uploads/1/3/4/1/134108845/98b98bb1be.pdf
    • https://cdn.sqhk.co/fopavege/MhheUgR/zikawugelugoverimego.pdf
    • http://nopotaz.medianewsonline.com/nugivezomivixasobebada.pdf
    • https://cdn.sqhk.co/munuluxel/8xhD2kE/10599021344.pdf
    • https://cdn.sqhk.co/pijajawopoji/huAjgdq/ruduvupozuji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nipanalex.epizy.com/2654203310.pdf
    • http://kavobomuvaweg.epizy.com/google_assistant_apk_4._4._4.pdf
    • https://uploads.strikinglycdn.com/files/c68216c1-1c29-4d83-a8b8-4443cb09c263/59672060603.pdf
    • https://uploads.strikinglycdn.com/files/6db7f811-8cc8-4e91-94c5-10ca352b02ed/sony_android_led_tv_32_inch_price_in_bangladesh.pdf
    • http://vovojoj.atwebpages.com/what_is_irishman_based_on.pdf
    • https://uploads.strikinglycdn.com/files/81b94d26-4a84-4326-9f09-cab5b47c51f5/dracula_di_bram_stoker_wikiquote.pdf
    • http://bidajalej.onlinewebshop.net/dexketoprofen_adalah.pdf
    • http://tamugaza.rf.gd/44742739429.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c8.bin
7fc01b90067cb08bbd9a684377047a7ffddc9cad487b315f145042553695e7fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C8 5028 bytes
font_01_sfnt_off0000f6d0.bin
2e973260e34babe754b07ae7bcd97d9f6baaabf31299370a9ad7ac76b1d342eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D0 14804 bytes

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