Malicious PDF — malware analysis report

Static analysis result for SHA-256 e595546257c072f1…

MALICIOUS

PDF

65.4 KB Created: 2021-01-29 04:23:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d9abaabadc4c935095e6ceefdd33695e SHA-1: d5af9ae35ae565998aa17291aafe0e5ae2fef06a SHA-256: e595546257c072f13dc753b22455ae3ec67449b578908aa0af6f021868d1a4bf
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, suggests a lure related to 'Heart with eyes brand play'. The presence of numerous links on disposable hosting further indicates a phishing or malware distribution attempt, likely using a spearphishing attachment as the initial access vector.

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
  • 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 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/123?utm_term=heart+with+eyes+brand+play In PDF document text
    • http://wbigs.space/principles_of_management_book_university_of_minnesotao7u91.pdfIn PDF document text
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/6144128.pdfIn PDF document text
    • http://vawigeg.22web.org/lizapuvugipurutopaxev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490001/normal_5fe31773114e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5fdc4c94c9586.pdfIn PDF document text
    • http://fortuneo.biz/pijunakipinobrf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473902/normal_5ff33d6ec5243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_5fda039db87c2.pdfIn PDF document text
    • https://nukoxola.weebly.com/uploads/1/3/1/3/131380146/2963231.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/gavowepajotu.pdfIn PDF document text
    • https://larigagip.weebly.com/uploads/1/3/4/8/134887586/vexatorakik.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/1532898.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
    • http://wuwepapose.epizy.com/good_night_images_hd_3d.pdfIn PDF document text
    • http://zudozam.epizy.com/nutrition_information_tofu_shirataki_noodles.pdfIn PDF document text
    • http://tomenederixi.epizy.com/cyberlife_android_jacket.pdfIn PDF document text
    • http://sabuxixu.epizy.com/esl_speaking_activities_for_adults_advanced.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6CE 5020 bytes
SHA-256: 2998e9e5ac3e0e61798f128098b09fd287a720ba0086b7ed56a08f1551217a34
font_01_sfnt_off0000c7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D4 9812 bytes
SHA-256: b4382d6d00886d8e6bc5af4bd78d9f448b85e084781c4159b8e0c4937918c37b
font_02_sfnt_off0000e958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE958 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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