Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f9062e970eb655…

MALICIOUS

PDF

73.0 KB Created: 2021-01-12 22:08:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e6d4998bedbf5c0ba9b611318eb78259 SHA-1: e718595352e9edaf638a0a62c4d561eca5d33fbe SHA-256: f7f9062e970eb6555f97509eafe4bae735078e7cb9668e055ec3bc557b243dc3
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=life+as+we+knew+it+book+review In PDF document text
    • https://site-1180269.mozfiles.com/files/1180269/my_arcade_dgunl-_3227_pac-_man_pocket_player.pdfIn PDF document text
    • https://site-1194807.mozfiles.com/files/1194807/arcade_fire_everything_now_cover.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/fd4a23.pdfIn PDF document text
    • https://neverazu.weebly.com/uploads/1/3/4/9/134901342/zonozavufixomexa.pdfIn PDF document text
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/6823378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473902/normal_5fdace605f34b.pdfIn PDF document text
    • https://site-1168276.mozfiles.com/files/1168276/devil_hunter_eternal_war_hack_apk.pdfIn PDF document text
    • https://site-1200133.mozfiles.com/files/1200133/remote_control_drone_price_in_sri_lanka.pdfIn PDF document text
    • https://mevajivikupewog.weebly.com/uploads/1/3/0/7/130775189/rugujuji_lejuzaxe_rajifajazo_lawamena.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/rakabexozu/wasuguzijezaso.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/aviation_safety_standards.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/654184924.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/wegiwasu.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_off0000d4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CC 4816 bytes
SHA-256: b6d306c3898138b355376c24ef977057dac6472c5b8921bc5f6c4f9aa02ca59f
font_01_sfnt_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 10488 bytes
SHA-256: b26eec7b30cc19be751eb738c4307b2f08868930580c78ed9309c1e3453bbdf1
font_02_sfnt_off0001093f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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