Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49eb37590ecad8f…

MALICIOUS

PDF

70.9 KB Created: 2020-12-19 01:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a0231f728a20e9d077d513f85885bd44 SHA-1: e1f46ad50c135ebbd59efc2e1e95bf52f54e94cb SHA-256: d49eb37590ecad8f8a6787d79fd54e4bfefd31e148231bad76a467ffceae1fa4
234 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, including a critical alert for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text fragments that suggest a lure related to 'store reviews'. The presence of numerous external links, many pointing to potentially untrusted domains, reinforces the assessment of a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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/123?utm_term=hear+our+voice+store+reviews In PDF document text
    • https://rabebazenapaju.weebly.com/uploads/1/3/4/7/134771608/4b59dc19e82ea.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/737a961061cd209.pdfIn PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/wulejapafimij.pdfIn PDF document text
    • https://guvoruba.weebly.com/uploads/1/3/4/7/134742814/f1130df8fa866ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f9e110586d99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410418/normal_5fb2f253861f3.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/1a7c13eb-bb1f-452d-8a5b-c0ba02220520/unicidad_de_triangulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e52e1c73-08e2-4cf2-9842-8915dffa76a1/47462805041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a755c866-07c8-4e1e-b8de-842c0c8b61b8/sumanujukuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b50bc9c1-306d-4234-aa41-a51770f40dd4/65099726803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7419446-2916-40ce-bea4-533e4cc6aa5c/lotodemazisev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9982366-4aa6-458b-baff-9ac1ee388091/watch_hichki_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dce14136-526f-4f38-a5f7-698399bb7dfb/wofujidowudidinejo.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_off0000cd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4A 4876 bytes
SHA-256: 2a3ed4ee3e75302721a5431950b2d64bb266ec625577643956c9d8d843441dc5
font_01_sfnt_off0000ddf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF7 2140 bytes
SHA-256: 49dddaa543544930169c80d10742cf71a10a90771d945bdf421e53748b1fa594
font_02_sfnt_off0000e7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D1 11328 bytes
SHA-256: 60e598924956bea2541cc84b0a6137fc111d5f9912a88952a01a47f0abde26f8

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