Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e97b9eaf8066aa…

MALICIOUS

PDF

72.9 KB Created: 2021-04-08 08:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85760759dfa0c1eee2f85778bd044265 SHA-1: 6e37e491145768919504f6822ea46103a8446c8c SHA-256: 49e97b9eaf8066aa599a14e6efc19b0b5b916bafe44e5510d808392e049b6ef1
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, flagged as a link farm, suggesting an attempt to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=mundo+de+postales+gif
    • http://jijimaxugixu.22web.org/c_ofstream_implicit_instantiation_of_undefined_template.pdf
    • https://powudeli.weebly.com/uploads/1/3/4/7/134772307/vezuzasovobin-wanebuziro-tasugewenopag-wekebulofuxuf.pdf
    • https://tesudegijalel.weebly.com/uploads/1/3/1/4/131438759/tavetogixi_gefogulor_teviti_sanufilu.pdf
    • https://semizomemakov.weebly.com/uploads/1/3/0/7/130739936/vogogomojoxon.pdf
    • https://cdn.sqhk.co/biwezabob/fquGjge/does_she_like_me_via_text_quiz.pdf
    • https://kikitepolo.weebly.com/uploads/1/3/4/5/134514310/xejuxijosawug.pdf
    • https://cdn.sqhk.co/kosadara/2wjdEic/76002784155.pdf
    • https://xiwesawubofu.weebly.com/uploads/1/3/4/2/134265581/7606485.pdf
    • http://zokugorevat.mywebcommunity.org/pusavirudagogogez.pdf
    • http://bukupiduge.mypressonline.com/o_alienista_adaptado.pdf
    • https://dujomimip.weebly.com/uploads/1/3/6/0/136086420/gometasosax.pdf
    • https://devudupaf.weebly.com/uploads/1/3/4/8/134880603/rujeluper_pagebukit_xalolilovuzudel.pdf
    • http://jerimujolegem.medianewsonline.com/interaction_of_lean_and_building_information_modeling_in_construction.pdf
    • http://bolawixefop.mygamesonline.org/66654884452.pdf
    • http://taxokijoba.sportsontheweb.net/volleyball_weight_training_program.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bagugexasorip.myartsonline.com/29953240712.pdf
    • http://bozitelededenox.epizy.com/valuvelopog.pdf
    • http://fesonukoropirum.rf.gd/69013691772.pdf
    • http://povodakav.myartsonline.com/consumer_buying_behavior_survey_questionnaire.pdf
    • http://pakuzubexur.rf.gd/iata_icao_airport_codes_list.pdf
    • http://zitilidi.rf.gd/26226134524.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_off0000dff7.bin
fa2e0e22c86e1ab81b18c360a38a2a2c152e72599bb1655c95956f2107ede568		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF7 5116 bytes
font_01_sfnt_off0000f188.bin
ad8b58dff79a1d84836e39d6898cffc08d3c5e9fdfcbf0002f2519ef947b8f09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 11432 bytes

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