Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b22fc97d37411a8…

MALICIOUS

PDF

94.8 KB Created: 2021-02-19 11:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f1bc34a0629f9feb779d433e93322b4b SHA-1: ba32b156f1026fbd63ea222f720b5dcd4c5688fe SHA-256: 6b22fc97d37411a84f032f76bad862b7898e865be822b0450ac20dc56f21aec0
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains references to car performance metrics, likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/strik?utm_term=2010+camaro+ss+0-60+1%252F4+mile PDF link annotation
    • http://pe50off.info/new_bollywood_silent_songsgn7ax.pdfIn PDF document text
    • https://tifowufiwadoxi.weebly.com/uploads/1/3/4/0/134098290/rugusafivuvojupo.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/09c298ea02b24.pdfIn PDF document text
    • http://vatemuredaxusob.22web.org/kidesekaxozetuwewudutis.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/libro_de_macroeconomia_version_para_latinoamericaaywxt.pdfIn PDF document text
    • http://digitalmedialit.com/balagangadharanatha_swamiji_information_in_kannadatqq87.pdfIn PDF document text
    • https://kogababofaf.weebly.com/uploads/1/3/0/9/130969162/7284342.pdfIn PDF document text
    • http://ekzo-fruit.ru/18336844116qaoi5.pdfIn PDF document text
    • https://begakidiwadagav.weebly.com/uploads/1/3/1/3/131397934/6666942.pdfIn PDF document text
    • http://update-win20.online/minasiziruwemajuxejima5i140.pdfIn PDF document text
    • http://ifeelgood.club/excel_bedingte_formatierung_leere_zelle_ignorierenttr3e.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/69088037926bpln.pdfIn PDF document text
    • http://italy-small.space/dutadezizofezamadocx22c.pdfIn PDF document text
    • http://aycotoro0.xyz/physicians_desk_reference_online_20185wrlw.pdfIn PDF document text
    • http://circulshtangcalip.website/auto_followers_on_instagram_app_downloady4a4j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/ryunosuke_akutagawa_in_a_grove.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/jinja2_template_extends.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_off000136b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B5 5488 bytes
SHA-256: cbca08e7d238b524b9a5d668979001591821211728e24c6f813b45c7a3af84d2
font_01_sfnt_off0001495b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1495B 10792 bytes
SHA-256: fadc8c0863a5b9830692df4d7dfd35df7b9761c5f1071269ef612102b5c7bd80

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