Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe90386535ffec1…

MALICIOUS

PDF

87.5 KB Created: 2021-03-04 02:01:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 410a2472972abf6378cc8b2faf55eeb1 SHA-1: 41fc14825f59fdfa90463132eab9961c3918b07a SHA-256: 1fe90386535ffec1847b76b066cbe6d3c656f37f830c5cb63a14b8651bb3f946
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or scam attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dugedepap.ru/award?keyword=can+i+use+groupme+on+my+computer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473619/normal_5fe59e1515787.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/Ngjgcpc/color_wheel_art_activities.pdfIn PDF document text
    • https://cdn.sqhk.co/degawatoze/jhhheHb/38805941297.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/59793038343.pdfIn PDF document text
    • https://cdn.sqhk.co/fubemabofof/eqiebii/recorder_songs_for_beginners_happy_birthday.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450516/normal_6031fdd9ecf50.pdfIn PDF document text
    • http://sexesex.site/lutebomuvilepdicqa.pdfIn PDF document text
    • http://duwosolutanuz.mypressonline.com/what_is_an_isekai_manga.pdfIn PDF document text
    • http://phillipen.online/77302248806cydl5.pdfIn PDF document text
    • http://grizhoff.ru/8731195855pqnsj.pdfIn PDF document text
    • https://cdn.sqhk.co/jipodipotaj/aHWFQ5z/samsung_email_address_format.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/txejfdY/76038890916.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/music_theory_for_dummies_guitar.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/3prL186/galaxy_defenders_vs_sword_and_sorcery.pdfIn PDF document text
    • http://bejawutipage.mywebcommunity.org/doruziwol.pdfIn PDF document text
    • https://cdn.sqhk.co/gabamulijawe/VX8jjgg/apple_messages_picture_not_downloading.pdfIn PDF document text
    • https://cdn.sqhk.co/nitagalut/hhfRih1/zatufijamodarufozako.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE590 5588 bytes
SHA-256: 04959f70c6af4abe0cfc04bcba26504da8f431bae52f63ae29d996b73240eaa5
font_01_sfnt_off0000f91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91F 5228 bytes
SHA-256: 4cc2e210c381302a876c19649f694651c415d90f4673a97f56f6dfffa6c977a3
font_02_sfnt_off00010ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADE 10428 bytes
SHA-256: 9f8dda6db558da23f942d5fa4427955926a3217c5f05707852c41f7500efaa44
font_03_sfnt_off00012eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB7 16176 bytes
SHA-256: e60bbe5136a530b3b99843587ccae52a24473c7ee3813e003e323cce49c5aabb
font_04_sfnt_off00014415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14415 2832 bytes
SHA-256: d6d4b6f1b7f352d432267b4f0e1a3b962fa55fceade102acb1249ce1b722a51a

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