Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c18aeeb2f55d70…

MALICIOUS

PDF

82.5 KB Created: 2021-03-28 23:39:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3b936bd09bd7b3bd6d4cd216a7bc2123 SHA-1: 070384da83d94f6d977c6035c4dd8eda169b88d3 SHA-256: 12c18aeeb2f55d70343963d8e781fe84e12a00063bf5a674549cc123c98656a9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links point towards an attempt to compromise users via web-based lures.

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 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.
  • 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://resalured.ru/strik?utm_term=me+before+you+streaming+indo PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473445/normal_5fdfbc00bc8be.pdfIn PDF document text
    • http://bogplaktnc.fun/when_did_walmart_release_black_friday_ada6i7w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480595/normal_5fe10eab40dcf.pdfIn PDF document text
    • http://levantemosaic.com/68786272331gwags.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_6054b94020ed3.pdfIn PDF document text
    • http://semengergel.ru/74578434102yrd8n.pdfIn PDF document text
    • http://gloslides.com/2860112674tbh0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416513/normal_5feaf4aba37d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_f4f32212cab0405eba7c6554dc1b3979.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/vshare_ios_9_no_jailbreak.pdfIn PDF document text
    • https://ce722411-b424-48ee-ac00-b4ed8818edd9.filesusr.com/ugd/bff0de_16271b05850e46b992a62019d23d2407.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/52295547640.pdfIn PDF document text
    • https://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_946d3a275f4140d9b31e64cf964bbe31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/88701093814.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/two_digit_addition_worksheets_for_kindergarten.pdfIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_f3c9d82c52d14d79b34b21139dc02eca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/petunel.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/51034597228.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/directed_reading_identifying_minerals_answer_key.pdfIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_0b149527827743bdb543d8fa69253485.pdf?index=trueIn 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_off000102cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CB 5440 bytes
SHA-256: 26755cdaa9f00b3d51540a9c7de1497cfc1cf775a53d33310b253ee81c4b77d0
font_01_sfnt_off00011546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11546 11732 bytes
SHA-256: b44af18b6d8211b7d58cbdfb3bc7caf3ec4b12a4a01ed82a27c6577abe5b00ab

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