Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a6e007fae2099a…

MALICIOUS

PDF

68.2 KB Created: 2020-12-21 20:53:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3f7caa0cba069aeef6e914b2210561be SHA-1: 05319939e17b502fcd6d2c0fc48eac9ebdceb934 SHA-256: c8a6e007fae2099a2bd9ef5b04f3baaa1757fa12aac160b22e5838c0158b5073
184 Risk Score

Malware Insights

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

The PDF contains a link farm and a callback lure, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffset.ru/strik?utm_term=samsung+music+apk+for+any+android+xda PDF link annotation
    • https://xuvowesajitox.weebly.com/uploads/1/3/4/6/134603534/f0c0df607.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/sefaritonos-nukivafeka-retisebop-regaxumex.pdfIn PDF document text
    • https://viserewisesu.weebly.com/uploads/1/3/4/8/134886384/jerexe.pdfIn PDF document text
    • https://noguvipeves.weebly.com/uploads/1/3/4/7/134717425/duwizelonagaka.pdfIn PDF document text
    • https://zekulosig.weebly.com/uploads/1/3/4/6/134689557/bf4dee37.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://static1.squarespace.com/static/5fdea7f851e6b539731cab78/t/5fdf1803fb7de13a6467ce3a/1608456196669/90540749847.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0edb2bd14ff0dd29ccbda/t/5fd0ce080c0c9b10ab115939/1607519753378/samsung_email_gmail_unable_to_validate_account.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/sharechat_app_in_tamil_jio_phone.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55c58405d5340f347683d/t/5fd66a0db1c3f31c7a8261da/1607887374305/quarter_baking_sheet_dimensions.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/30572758369.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d0c6791da6493f6663f7/t/5fca21fdcf87d0256ff4c86c/1607082494590/53938714225.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57982a879396864270a01/t/5fcd801724c49707d3365b1d/1607303191484/getopufibamapa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc804350e6d73f00910ce2/t/5fdd220f0b57143136721c21/1608327695981/create_music_beats_free_software.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07dde27a199023ab34438/t/5fc3b3ac9b1ed035384e0fa9/1606661036980/diditat.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_off0000be7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7C 5464 bytes
SHA-256: 7f01a62012ae97db677344ca27f0389ee787d61e96435d8d4fc2dff8b6cc3488
font_01_sfnt_off0000d0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F9 10180 bytes
SHA-256: a6b82ed7ae2bb3c3ba061ca71c53ee3d7051281f295e3d6a5ba832237a2fc651
font_02_sfnt_off0000f3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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