Malicious PDF — malware analysis report

Static analysis result for SHA-256 e399dd87eafbd974…

MALICIOUS

PDF

69.2 KB Created: 2020-12-19 15:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 594983dbe809c311993f09c24097d775 SHA-1: 64d0e28003359351556c1e88cdc4e3cccfa53b0e SHA-256: e399dd87eafbd974cc4bfce1cc123d58072624ea9e1f4a41540ab462edddf955
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, and heuristic analysis indicates it is a callback phishing lure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL and the callback phishing lure strongly suggest an attempt to trick the user into a fraudulent phone interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=hello+tune++free+airtel In PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/d0fe8fe407a7dea.pdfIn PDF document text
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/fulosomana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421209/normal_5fa550d8b00ec.pdfIn PDF document text
    • https://lupagizan.weebly.com/uploads/1/3/1/6/131637074/4509829.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/852a0149-cd6a-47ff-88c7-b5bd35919b10/nuguxikuzazali.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/messenger_lite_aptoide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/141131b8-2a67-4514-af18-ad531062e46c/votigigakipopojimateza.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/denavodexebifonunopilexer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcda55ca-744f-4777-93b1-e52de3630477/61702038148.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/49574841619.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/pakidudababigujov.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/hearthstone_dalaran_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a3289b6-0461-49b5-b516-fa52a9e83d25/vobojet.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/56173609077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3854306-eb32-4b9b-80ba-16a136d38b88/xamuve.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_off0000d36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36D 4544 bytes
SHA-256: 772069ea34dd798e6172157e65f3efd4c5646ccb9376cf48e40a2a983e0eded0
font_01_sfnt_off0000e2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EA 10708 bytes
SHA-256: 7fb9e2202ca73a1ed5a580a3c64f0c2215add1d871e9c46f75ea64a3be677bed

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