Malicious PDF — malware analysis report

Static analysis result for SHA-256 70cb6dad6f7542b2…

MALICIOUS

PDF

115.2 KB Created: 2021-01-06 22:17:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 5db7b575497d67073573315de8d91a35 SHA-1: 063bffea6bd7d77f68ffbdb09502983c295872fb SHA-256: 70cb6dad6f7542b264d6edfc6368fd17f5a8d25cd4566675febe55c897f3771d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to phish credentials or deliver a secondary payload. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • 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://traffine.ru/aws?utm_term=confidential+psychological+report+example In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5f89839632e01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5fd6aadc1b14d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462982/normal_5fe96153b1a10.pdfIn PDF document text
    • https://cdn.sqhk.co/velizovatim/jmWVhia/85936216822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475215/normal_5fdad5b030050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383445/normal_5fd735f35516d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/79e839eb-47bd-4da8-aad2-6dafd66478a6/zitula.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/18619427463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b6fbda-e0a9-4e56-8913-32b6a311630c/vedelefududukamuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/hilarious_riddles_for_adults_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad62b10a-e23c-44f3-93e1-3a62e428c8a4/12512123508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f8b5964-50a8-4ee6-b567-769d472c0519/70355601544.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/chutu_chutu_song_lyrics.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_off000178d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178D9 5548 bytes
SHA-256: 81433708624ca7aebb7f972201e167b402368d649d7b725d6251719e17a01d4c
font_01_sfnt_off00018b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B9D 10936 bytes
SHA-256: 150f331c131bab2876711d37df95e5bd7351809ad4f89c2f2f7aaf354c43183b
font_02_sfnt_off0001b0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0E5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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