Malicious PDF — malware analysis report

Static analysis result for SHA-256 a585e7c7cf743adf…

MALICIOUS

PDF

102.1 KB Created: 2021-02-27 13:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 713e071d43953612ff6e938da9e99217 SHA-1: 179413b5236a886d364709f8a9209549d5f6f1dd SHA-256: a585e7c7cf743adf0e0a3636ddd59478e7193a0d74306286dfad4435272d06e7
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. One of the extracted URLs, 'https://jumiwimov.ru/award?keyword=beats+solo+hd+wired+replacement+ear+pads', appears to be a lure for potentially unwanted content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jumiwimov.ru/award?keyword=beats+solo+hd+wired+replacement+ear+pads PDF link annotation
    • https://jutijodofolumel.weebly.com/uploads/1/3/4/0/134012985/somefodojoroso-xujujujeretu-jewawewato.pdfIn PDF document text
    • https://fatajoser.weebly.com/uploads/1/3/4/6/134655124/bc552040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481684/normal_6036a93b9b13f.pdfIn PDF document text
    • https://vijisazegogufob.weebly.com/uploads/1/3/1/3/131380966/bupaw-lolukibagidara.pdfIn PDF document text
    • https://vogapixafaroge.weebly.com/uploads/1/3/4/2/134234717/1539006.pdfIn PDF document text
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/1875727.pdfIn PDF document text
    • https://tiletemilowa.weebly.com/uploads/1/3/2/7/132710791/7066243.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450876/normal_5ffaceb0d2639.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460966/normal_5ff7ea1c63dfd.pdfIn PDF document text
    • http://brumbum3.xyz/55071133753gpcrl.pdfIn PDF document text
    • https://biziliwedurukax.weebly.com/uploads/1/3/4/8/134889104/4920949.pdfIn PDF document text
    • https://bipesulevawitod.weebly.com/uploads/1/3/1/4/131437914/791046.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422390/normal_5feb3c6c326a9.pdfIn PDF document text
    • https://xuxedujuwa.weebly.com/uploads/1/3/5/3/135345360/mokazebopazuluk-jexejura.pdfIn PDF document text
    • http://auto-fishing-rods1.club/89536160202loni7.pdfIn PDF document text
    • https://kofasarafafe.weebly.com/uploads/1/3/5/3/135390193/68247.pdfIn PDF document text
    • http://euroshopme.site/zefugidavadimabarezipixo47mnu.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/bizamesuwepe/example_gantt_chart_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/cute_baby_images_for_whatsapp_dp.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/49276264751.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/wowojoniluvabokulafoko.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_off0001424c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1424C 5244 bytes
SHA-256: 16fc1cc17fdaddc049406cda09e247c2704f1f2650c65cb5826d8d06dfc25e59
font_01_sfnt_off000153f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153F9 11636 bytes
SHA-256: 20be9156cfc45f90a16d8d1a9348f543e4d61543293f43c1b2534d918e5b5085
font_02_sfnt_off00017aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AA2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2