Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c18cebaf347aa11…

MALICIOUS

PDF

146.3 KB Created: 2021-02-22 15:14:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d01dd55f0e1635507ce4ecde0d92ae75 SHA-1: 512502b6019e526545090de2f7d9467e4d53d588 SHA-256: 3c18cebaf347aa114f5c291f9cf430db97f7e0c5497dde79bb4e9b9ae6097e41
226 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though truncated, mentions 'Wenzel rockwood tent setup', which appears to be a lure to direct users to malicious websites for potential phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://jottigo.ru/aws?utm_term=wenzel+rockwood+tent+setup PDF link annotation
    • https://cdn.sqhk.co/wexovezojab/gewbTjj/semojibavevikitibeno.pdfIn PDF document text
    • http://coolstudent.space/jesse_livermore_net_worth5rpfd.pdfIn PDF document text
    • http://edayafar.xyz/313722373420zqfp.pdfIn PDF document text
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/7007744.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/1nfnje1/11626842814.pdfIn PDF document text
    • https://ruregogawumol.weebly.com/uploads/1/3/2/8/132815787/nabiwafidulib.pdfIn PDF document text
    • https://cdn.sqhk.co/sadudolamom/gcE9Lqa/mens_haircut_curly_on_top_short_on_sides.pdfIn PDF document text
    • http://pihodze.com/kikitefarurovidony1eem.pdfIn PDF document text
    • https://pilogowizimofog.weebly.com/uploads/1/3/4/6/134604263/mulomokovurizixilu.pdfIn macro / runtime command snippet
    • http://voirlo.xyz/padixegi6fth3.pdfIn macro / runtime command snippet
    • http://wwbook.org/39057286475idbcw.pdfIn PDF document text
    • https://lufurazorume.weebly.com/uploads/1/3/0/8/130874109/2857691.pdfIn PDF document text
    • http://tehnotop.space/2417770145epadl.pdfIn PDF document text
    • https://cdn.sqhk.co/buzulexoxuve/Ogcx9ic/kosmonavtes_escape_reality_level_4.pdfIn PDF document text
    • http://esmoney.site/how_to_do_wing_chun2ezf1.pdfIn PDF document text
    • https://cdn.sqhk.co/tegiriwepaj/bihuhcj/assistant_brand_manager_salary_nyc.pdfIn PDF document text
    • http://greenbike.shop/difosuninubutixo6uota.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/MlGdgif/mermaids_cher_winona_ryder.pdfIn PDF document text
    • http://xsale.trade/314130058633yby1.pdfIn PDF document text
    • http://pihodze.com/kikitefarIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000201f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x201F4 5076 bytes
SHA-256: 137ddfd4c051406ecb70abd35c08b6b84df7dc3ff863017ead3691e673544afc
font_01_sfnt_off0002136f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2136F 12168 bytes
SHA-256: 516ecdeead442c17e319dcb8e307f7097f7da621f30e3e87d19b2440e2bca558

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