Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f8b4dfb10fa9e8…

MALICIOUS

PDF

110.2 KB Created: 2021-02-21 12:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: fcb5fae549454f30cdec9e2b0b8d6b1e SHA-1: 3cf09a76d7f17eac93980f7085392b3d93fdf4f4 SHA-256: 49f8b4dfb10fa9e887b595cee5c8265725b7ad5f5ce14f4a54deaf02fdbbd52a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for distributing malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/wix?keyword=site%252Funblocked+games+66+ez PDF link annotation
    • https://cdn.sqhk.co/satidaruxami/Q3T3jc1/kuwisobeti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495034/normal_6029a4af41681.pdfIn PDF document text
    • https://dubakaxejevam.weebly.com/uploads/1/3/2/6/132696109/8850d8f5e3177b.pdfIn PDF document text
    • http://rukozhop-guide.com/962488557047zwxy.pdfIn PDF document text
    • https://bujajegufo.weebly.com/uploads/1/3/4/1/134108800/1222410.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483345/normal_5ff55ea414524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_600e880859204.pdfIn PDF document text
    • https://cdn.sqhk.co/mevexobuzur/fa1giie/coder_mip_battery.pdfIn PDF document text
    • http://musc-media.xyz/20400343521co7i6.pdfIn PDF document text
    • http://logvoz.ru/57740438913zrxli.pdfIn PDF document text
    • https://cdn.sqhk.co/simixejazir/Vvhhhcr/21362648536.pdfIn PDF document text
    • https://tanatomunedasov.weebly.com/uploads/1/3/5/3/135325499/jagapagu-winupoduwimo-soximud-juwokudugokiwaz.pdfIn PDF document text
    • http://goldotzyv.ru/22420106142vok6u.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://s3.amazonaws.com/bupijila/rogers_duroid_5870_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/free_esl_worksheets_for_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/73359143943.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/tagitodirosifebodazo.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000141b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141B6 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off000151ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151AB 5592 bytes
SHA-256: eee8a3f319bb7fbb20dc3f5f65a8842f3d06a545123160cde4be789c6e0d5446
font_02_sfnt_off000164aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164AA 10240 bytes
SHA-256: f25d90ce7a5c5fb31a20d74b7a1ff14b14c6f95f32e31b99458997928d404048
font_03_sfnt_off000187f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187F0 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f
font_04_sfnt_off00019c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C5A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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