Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0400093e641c62…

MALICIOUS

PDF

82.8 KB Created: 2021-03-20 03:15:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c4ea62ba9cb401f1243434a9a646442a SHA-1: 7841a497ff45297de29128e284d6fb591e1190c4 SHA-256: 8a0400093e641c620c185812bd61b999b00f1ae5d56a8264eb554e94ccc13c5f
134 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external links, many hosted on disposable domains, and the 'ML_NYX_PDF_MALICIOUS' score strongly indicate a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to employment background checks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/wix?keyword=lowes+background+check+form PDF link annotation
    • https://cdn.sqhk.co/kusedesomawa/BF6hdjd/44163009797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489259/normal_5fd38ef54ed8a.pdfIn PDF document text
    • https://cdn.sqhk.co/suwojixuwebi/ibhepkw/gepiwetewikanatusobofe.pdfIn PDF document text
    • http://neo-tp.ru/raving_fans_book_review_pptqu681.pdfIn PDF document text
    • http://daddytestit.xyz/novamatujekidasjg1h5.pdfIn PDF document text
    • http://getyourcredit.info/the_amulet_of_samarkand_book_review2nlct.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/bathukamma_songs_lyrics_in_telugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479710/normal_6036cf5786018.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/xuzopusavimuwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476421/normal_601faac63ce56.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/ahbihig/lefokotawumovasenolabi.pdfIn PDF document text
    • http://majusenise.sportsontheweb.net/94131376112.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/xixawegofajenerajibazita.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457560/normal_5fc7335a86650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472495/normal_603c0cec0d299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497358/normal_601bace7962aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_6025c3927faf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472185/normal_604b67076b7df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sodowurivav.onlinewebshop.net/can_beats_be_charged_wirelessly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040cddfe-d060-4038-8d48-40ed324f9a3c/dr_axe_keto360_shopping_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5c4512-368b-4738-b528-75d612ea2cc9/blue_jeans_video_conferencing_protocols.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65654038-5070-434f-873b-df8d825b2086/the_action_bible_gods_redemptive_story.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98F 5640 bytes
SHA-256: d4618a47b3ae8a0c18711f95c555d30636ed9864b832f61016f8832dbe74bbfe
font_01_sfnt_off0000fca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA8 1796 bytes
SHA-256: dfab3945eace5ba27be1ad95d63d5142397767eab6bca27773794b33bda2302c
font_02_sfnt_off00010532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 10132 bytes
SHA-256: 8cc990e71b0f97c704ee0146befd794e92cd15039edff8eae6b80787fb320ead
font_03_sfnt_off000127fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FA 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15