Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f30f69652ac97e6…

MALICIOUS

PDF

80.9 KB Created: 2021-03-31 16:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eaa7be81f3490c03eb772479a89d032 SHA-1: aa2caa23a6204f5e02b7456d38c02efe897b628c SHA-256: 2f30f69652ac97e68fb4bf758c8f9537f394cd4e6175adef1379fe1c6e39bb1f
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a free baby shower bingo sheet generator, which is a common social engineering tactic. The embedded URL, 'https://yafferge.ru/123?utm_term=free+baby+shower+bingo+sheet+generator', is flagged as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/123?utm_term=free+baby+shower+bingo+sheet+generator
    • https://cdn-cms.f-static.net/uploads/4459477/normal_6057dccb56886.pdf
    • https://cdn-cms.f-static.net/uploads/4488092/normal_60629eabbc8c7.pdf
    • https://cdn-cms.f-static.net/uploads/4393356/normal_6024476aa9948.pdf
    • https://static.s123-cdn-static.com/uploads/4464852/normal_6007ba9e7c6b1.pdf
    • http://kawixepitit.iblogger.org/real_book_melody_and_chords.pdf
    • http://tetufava.iblogger.org/84449626341.pdf
    • http://dosijefa.mypressonline.com/netoketumobekobexek.pdf
    • http://toxipoxekej.medianewsonline.com/wapegixekeserapagujefijo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_7d7cb20ec0624579b16776697824a1c7.pdf?index=true
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_2df62bebb5e747ea86b10331ea20d2d2.pdf?index=true
    • https://s3.amazonaws.com/jadudusujuje/17079700583.pdf
    • https://s3.amazonaws.com/tojazudibumogab/how_to_install_hp_officejet_pro_8600_wireless_on_mac.pdf
    • https://53ee2ee6-42da-4c96-954f-60f726bc8d53.filesusr.com/ugd/de2744_008acf4c7ace458cbb5f39d6d237ccba.pdf?index=true
    • http://josewovegufi.rf.gd/zidemiluxusobogatuvax.pdf
    • http://valogaberel.rf.gd/75046637694.pdf
    • https://s3.amazonaws.com/sowewazulejewi/schlage_keyless_lock_manual.pdf
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_78f76d833d67458e8c6c3e60cca2c4d9.pdf?index=true
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_34beeca7c0114feca68a14de7442ce23.pdf?index=true
    • http://madekubadasa.rf.gd/lunivi.pdf
    • https://s3.amazonaws.com/libeganot/dell_inspiron_one_2320_drivers_win7_64_bit.pdf
    • https://s3.amazonaws.com/lolaritemukole/muvalusi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe3a.bin
d88be163fa253ba696fc9b4dc59797a20bc3fb88dabc252ed6111475a6ecaec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 5204 bytes
font_01_sfnt_off00011006.bin
e42a2b8f78f29b5132c34aa52724240b051a7d3819aefb19285452d7ffa1668e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11006 11212 bytes

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