Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e9f54a267f98c5…

MALICIOUS

PDF

87.7 KB Created: 2021-03-24 01:23:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 54f73795721be72d85a0358d7abda87a SHA-1: 5440f00e480a303c2a3ad97ead9c715e83d17e88 SHA-256: 15e9f54a267f98c594a17b41346728ce760198b250d82920c1db18e6538325a8
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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.
  • 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/award?keyword=neonatal+sepsis+pathophysiology+pdf PDF link annotation
    • http://kunozoxutokusu.mygamesonline.org/effective_academic_writing_intro.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/45305702673.pdfIn PDF document text
    • http://riwozizedilar.mygamesonline.org/zozeliturinata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a7aaef5-9338-419f-a0ca-83bbe61654d9/kagakebubawex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e45e8a-35c6-4fa6-83ac-f403c582ddb0/vukipojulewabolovowis.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/dijozadeweruradafotul.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/39036978312.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/front_end_interview_questions_and_answers_github.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/heil_furnace_age_serial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a0449dd-13bd-44e1-bbe4-7ca67ec26ee8/the_fallout_netflix_jenna_ortega.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/82739033572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d74a471-7d4b-4a8f-b6bf-65b70f6bf476/jutolakoxarofipamivif.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/59774109615.pdfIn PDF document text
    • http://jemileti.atwebpages.com/the_hidden_staircase_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/pojofavofisila.pdfIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_2fefef95b0354a0a97cded710714413c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiduro/61458520212.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/how_to_set_honeywell_thermostat_temperature.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/how_to_make_low_budget_house_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/949b60cc-d43b-41cd-917a-808ee3137ccf/vulenatad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4771a2c6-7e58-4e7b-ada8-7e266c89d97f/kuliton.pdfIn PDF document text
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_87e64aef4b3948048659c0b3f6de3356.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/17221f92-fc41-4e21-a709-67444046de64/xojumivebuxidajuzefim.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_0b913de51a3e4dbbbd87f47ab5effcd0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jinabom/amazon._fr_android_app_store.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 5276 bytes
SHA-256: c75b65d43fe613bfb10cf0011146c1140bedc0162348d8a09b115e17debc3c47
font_01_sfnt_off0001161e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161E 10980 bytes
SHA-256: 246c94d962c5a432ce9441e0a16fb11816c0520941ef35d67c40fcd2614a6f96
font_02_sfnt_off00013baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAF 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953