Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1801a34cd07bc91…

MALICIOUS

PDF

73.1 KB Created: 2021-02-19 09:37:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 29441647911c25e33fcdef53c50e4532 SHA-1: a94382d13c92c043ba69e9e5dd84033de5cfcb5d SHA-256: e1801a34cd07bc91ea00590feeccbe744e0143a4d0e941e40debde5443c360c8
274 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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) or Microsoft license-boilerplate 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://yafferge.ru/wix?keyword=1b+hoisting+license+study+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_601b86dd5ff98.pdfIn PDF document text
    • http://wikatugakuvifi.iblogger.org/us_citizenship_test_2019_one_answer.pdfIn PDF document text
    • https://mitumeme.weebly.com/uploads/1/3/4/8/134879381/1712467.pdfIn PDF document text
    • https://mosagalalevo.weebly.com/uploads/1/3/4/6/134668437/nadetopowubuvafuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449012/normal_5fd85f661bc6a.pdfIn PDF document text
    • https://voxiranadazezud.weebly.com/uploads/1/3/5/3/135312978/rifabemevowanipure.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/jifedefujodu/era_paleozoica.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/sistema_nacional_anticorrupcin_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/wedding_card_template.pdfIn PDF document text
    • http://tagugatukosag.epizy.com/statistical_modeling_by_wavelets.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/24034596151.pdfIn PDF document text
    • http://zepibugab.rf.gd/count_days_between_dates_crystal_reports.pdfIn PDF document text
    • http://kutepiguzusudax.epizy.com/79807507169.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_off0000e1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AF 5096 bytes
SHA-256: 9e73e91840087070af651a46c3bcf39f77a932cbf6cc72b6c5c2d641792faa6d
font_01_sfnt_off0000f30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30D 10788 bytes
SHA-256: e01792842aa3135a1b0df0aed2123c13bade6543fd30972149fd781b6aba85de