Malicious PDF — malware analysis report

Static analysis result for SHA-256 107bdde265e13d9f…

MALICIOUS

PDF

78.2 KB Created: 2021-04-26 16:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 64fea6c8e8d5619d6995af454da8e467 SHA-1: 224e6d2e464652f2631a34680625552447547762 SHA-256: 107bdde265e13d9f936165d7ac5102d510a7746b085314305a82cb1cc52b68b7
244 Risk Score

Malware Insights

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

This PDF document is classified as malicious and contains a large number of embedded links, many pointing to disposable hosting services. The document body, though heavily obfuscated, appears to be a lure related to crocheting, likely intended to disguise the malicious nature of the link farm. The primary attack pattern involves directing users to potentially harmful websites through a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+crochet+a+baby+hat+for+beginners+step+by+step+slowly In PDF document text
    • https://pipenibeteza.weebly.com/uploads/1/3/4/5/134508730/270009.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392191/normal_5ff2ac600e584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449170/normal_603d14970c1b9.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/hbifZhg/61123493520.pdfIn PDF document text
    • https://nalakipivexovob.weebly.com/uploads/1/3/4/3/134385055/kidawa.pdfIn PDF document text
    • https://waratonis.weebly.com/uploads/1/3/4/2/134235653/vufigoto-tubis-tarofad.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/hciaggq/7772844392.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445745/normal_5fcfb43bb5873.pdfIn PDF document text
    • https://panelaxefejavej.weebly.com/uploads/1/3/5/3/135306159/kefamakimogisodege.pdfIn PDF document text
    • http://899themes-demo.ru/sekuzatironuterexolma1z.pdfIn PDF document text
    • https://jesipawuba.weebly.com/uploads/1/3/0/8/130874316/vuxikefixo_titonusuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_600cfb767c29a.pdfIn PDF document text
    • http://idealicaitaly.site/how_much_does_car_alarms_costcu76c.pdfIn PDF document text
    • https://gizetaxawu.weebly.com/uploads/1/3/1/8/131871526/5dc4663a108e.pdfIn PDF document text
    • http://katipef.medianewsonline.com/bibop.pdfIn PDF document text
    • https://dolafodapeke.weebly.com/uploads/1/3/4/7/134705679/doximuteb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456122/normal_60391a05c55ee.pdfIn PDF document text
    • https://pizizidoto.weebly.com/uploads/1/3/0/8/130873839/3587023.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/97376677710.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED1 5572 bytes
SHA-256: a0cdf8ca975b24bd949bf1275b59cf970076b796aa5cb49bc2e42e48e1e8d9fa
font_01_sfnt_off000101da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DA 12116 bytes
SHA-256: 7a3549947501ab965c988fc8c742da27d021ff4a3a65ca23c06d2a9598df95dc

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