Malicious PDF — malware analysis report

Static analysis result for SHA-256 02167f31816ddf2b…

MALICIOUS

PDF

92.1 KB Created: 2021-04-21 19:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8855c9d85d30e75e33bf8db0a703c5a1 SHA-1: d0529972cec9198f72f3c6fa4e0890ab1a83bb99 SHA-256: 02167f31816ddf2b595bc70852a09ebfa873d4c37ff7629abc53b694251a5679
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting an attempt to direct users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a common attack pattern of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/strik?utm_term=how+to+wind+a+bobbin+brother+project+runway
    • http://kawolamekepe.22web.org/57179335157.pdf
    • https://wegodirudime.weebly.com/uploads/1/3/2/7/132740829/jibidiv_pugefilexe_gosavikan.pdf
    • https://cdn.sqhk.co/tigepukeri/9Nv33gg/special_forces_group_2_for_pc_free_download.pdf
    • https://radisowe.weebly.com/uploads/1/3/4/3/134366404/leven_toluratuwozog_dulafexefep_rabakirebimaxax.pdf
    • http://kudopifupelixi.22web.org/86269815398.pdf
    • https://mexavabawidusa.weebly.com/uploads/1/3/4/3/134375000/1887232.pdf
    • https://cdn.sqhk.co/medijamowole/ghgfDgj/double_dragon_4_switch_gameplay.pdf
    • https://cdn.sqhk.co/sudizatase/cBHcMJ2/dawufujipunoziju.pdf
    • http://senenetikoxikom.22web.org/ligunisebanofizofibod.pdf
    • http://kekijojovif.sportsontheweb.net/biology_notes_class_12.pdf
    • http://ruvenebigolusep.mywebcommunity.org/list_of_dog_breeds_a_z.pdf
    • https://rujijixagav.weebly.com/uploads/1/3/1/3/131383475/704ad82.pdf
    • http://tarezirok.mypressonline.com/92434117031.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/leributafa/sulfuric_acid_formal_charge.pdf
    • http://jurizamumi.myartsonline.com/pafino.pdf
    • https://s3.amazonaws.com/jitimesolagun/bibejukopifiket.pdf
    • https://s3.amazonaws.com/bulujono/ntse_exam_answer_key_2017_tamilnadu.pdf
    • https://s3.amazonaws.com/wajufifenoxuj/navy_seals_requirements_physical.pdf
    • http://tajajal.rf.gd/63976086591.pdf
    • https://s3.amazonaws.com/timeziso/kederakigijamugosagi.pdf
    • https://s3.amazonaws.com/liwara/66730488407.pdf
    • http://jadurik.rf.gd/38994678761.pdf
    • https://s3.amazonaws.com/begijufadi/ruwulufafujoligof.pdf
    • http://jabodegodonirad.atwebpages.com/edit_documents_word_2020.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_off0001256f.bin
0249507b8b5ddb2b4e83e979314eaf54d87845c0c56149039b9bba87565c25d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1256F 5324 bytes
font_01_sfnt_off00013796.bin
1e0395e269483c44b1c023b23716354fb1f76bdfab53a0479f1c023eec0a285d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13796 12876 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.