Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf0f57ca8a14ae3…

MALICIOUS

PDF

52.7 KB Created: 2020-10-15 06:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 18aeb4eb55ce48ab5e3e7a9eab093506 SHA-1: ed2ccddf8adb65d7edfb4c8ce6136428c8b88989 SHA-256: 7cf0f57ca8a14ae3681e6ea35a55564a117171390b6d0f0aa9c8596cac619d56
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The document body text and heuristic firings indicate a fake invoice lure, designed to trick the user into clicking the malicious link. No scripts were extracted from this sample, but the presence of embedded links and the invoice lure strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://cctraff.ru/strik?keyword=edison+fattura+luce+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f87ba2187b56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f877ad32e5cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f8771a90e7f7.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/sikara_wetobuzipoli_zebivunawat_rekutagu.pdfIn PDF document text
    • https://vurofagulomefu.weebly.com/uploads/1/3/1/4/131452840/2592974.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • https://site-1044024.mozfiles.com/files/1044024/xiwokubopon.pdfIn PDF document text
    • https://site-1036756.mozfiles.com/files/1036756/kinavasajulisizitaxapezut.pdfIn PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/92120322087.pdfIn PDF document text
    • https://site-1037035.mozfiles.com/files/1037035/5873751510.pdfIn PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/3def0.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/865478.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/1437215.pdfIn PDF document text
    • https://nagifinapu.weebly.com/uploads/1/3/2/6/132696111/fegejuladofagiwedop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5f87be1c0c83d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f876e7768aa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5f876bc206b44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8719909c1ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f87105be994e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0300/5086/files/walking_with_cavemen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9660/3814/files/144628683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6669/3534/files/lane_recliner_spring_replacement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5012/9813/files/61471695852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4673/0390/files/governor_of_poker_2_full_version_apk.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_off00008cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF0 5108 bytes
SHA-256: 76bbac821637b9bc05a1af561189d511ad2babfee00d30c4cb3dd0071c7210bc
font_01_sfnt_off00009e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E61 11408 bytes
SHA-256: 5353a5821f4355139ca335f418fbebcd6def7e4884314d159c76f86cf95cfd58

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