Malicious PDF — malware analysis report

Static analysis result for SHA-256 83cae447e0954351…

MALICIOUS

PDF

74.3 KB Created: 2020-12-22 03:13:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: eda9456d87469914cfff6384751cea75 SHA-1: d6a2d81c14a7d31bf1350a1511b3866ea1228f01 SHA-256: 83cae447e095435173d62cd983171841d6e34a4bb579c0b7c6b74f870cc49d75
162 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also listed as an embedded URL. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan. The document body, though heavily obfuscated, contains text related to an 'FDA establishment inspection report definition', suggesting a lure to disguise the malicious intent. The presence of a malicious redirector link indicates an attempt to lead the user to a harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/aws?utm_term=fda+establishment+inspection+report+definition In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fde879f44058d21a0e474c5/t/5fded5517514fb3b764fd333/1608439122311/macy_s_twin_bed_sheet_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d9eea34-a1a7-459b-b4f0-dc0e3066fcc1/worksheet_acids_and_bases.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcede47d5d65324e4a9a4c1/t/5fd121d110275a0b908eefdd/1607541201886/84847785695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e680d367-937a-4402-b7c6-dd42a465cae1/kigifewiforosadobad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2a4ad7fbea164c2cd181/t/5fde3efeef8e407a9e8ada04/1608400638745/rofogodok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26bc8e2-c9a5-4be9-8af1-c63be36e0e1e/door_slammers_2_transmission_tune.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6fe7f54d69c596232e783/t/5fc8499e7ff5a343ebf0209e/1606961567653/guvuk.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/prefix_suffix_word_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b03bbd14ff0dd2a824dd/t/5fc50f5161e25426e1d7bc16/1606750034736/wawelobowami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a149ea31-9417-492f-8f2d-001aff3cf80d/runebesasig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47bad03-1fe6-4f51-acf9-60bfa693573b/hello_kitty_playpen.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/13954215250.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3bce8a13a450bab05ef87/t/5fcd3e4beb18547f4b90d3f3/1607286348496/46801456144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c2e8056-51b7-413e-a77d-ff9f7fc88e41/surveying_principles_and_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe136f88-33e3-40da-a0a5-7492f703d11c/zowunukigirut.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54d6ff7cf8c754047e780/t/5fd0835bc0a29916a56d5804/1607500635471/live_fish_wallpaper_download_jio_phone.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_off0000e4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D2 5488 bytes
SHA-256: 2dc0825009c36cf8eef3ec096b2ca9b0ae45219770558f5a2985dae5d41261dd
font_01_sfnt_off0000f74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74A 10544 bytes
SHA-256: f7a6fd153916906b260b69dd16417804fd24338eb095a2c9468156bcad42a918

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