Malicious PDF — malware analysis report

Static analysis result for SHA-256 6675497c8521ff4d…

MALICIOUS

PDF

69.6 KB Created: 2021-01-12 13:17:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 00b88f3246fc050a9bfca0bd17e2e5fe SHA-1: 51e8cc97ac228186ace343dd82557e70d22d4d7f SHA-256: 6675497c8521ff4daafb2fd9863c2126fb9925efeebd5781aad9a5607b0a7466
182 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating it is likely a phishing or malware distribution lure. It contains numerous embedded URLs, with at least one identified as a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains references to 'Appvn' and 'apk free', suggesting a lure related to app downloads, potentially leading to malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7606

Heuristics 4

  • 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.
  • 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://ggtraff.ru/aws?utm_term=appvn+latest+version+apk+free In PDF document text
    • https://cdn.sqhk.co/vujagefamig/WhfkLji/96255154172.pdfIn PDF document text
    • https://site-1172508.mozfiles.com/files/1172508/19478053142.pdfIn PDF document text
    • https://kerumesuni.weebly.com/uploads/1/3/4/1/134131613/vikezaruwiwat-dusike-tujuse-pogidomomab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383807/normal_5ff763b729e79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448558/normal_5ff759a7b6dc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387037/normal_5fc504b73ee0f.pdfIn PDF document text
    • https://gazuxajolitivik.weebly.com/uploads/1/3/4/7/134770387/sedinewenifuviki.pdfIn PDF document text
    • https://site-1174578.mozfiles.com/files/1174578/pikijigobuwagaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497638/normal_5feaf69c334c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5fb6e167b00cb.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/gekotareluwele-fipet-sosiwuneposi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498983/normal_5fc424476d928.pdfIn PDF document text
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/3239335.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/kavugusepe/mowikagiwezakulopakebova.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/wifidajiturukurovigiv.pdfIn 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_off0000deb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB0 5008 bytes
SHA-256: ec25dd405c7a4702e98ec83142c3583a852b96c9c378808dea45aa3c2adfa4fb
font_01_sfnt_off0000efc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC7 2468 bytes
SHA-256: e2c4bd44b03e950acc8b739c426831c27d59e78646ffb76a2129046b4903e497

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