Malicious PDF — malware analysis report

Static analysis result for SHA-256 224753a78189d135…

MALICIOUS

PDF

72.8 KB Created: 2021-04-06 12:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 33ef0b56cac83db090156cace94be356 SHA-1: d4dada067e90f647b82947f83d7e7e70e5282811 SHA-256: 224753a78189d135014f2fc74691d1f908e4d91b9e975ed3ca1f7bc138f4c3aa
176 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. It uses a callback-phone (TOAD) lure. 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 0.9997

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/aws?utm_term=ryobi+18+volt+dual+chemistry+battery+charger+manual PDF link annotation
    • http://piwulefimer.22web.org/free_printable_contraction_worksheets_third_grade.pdfIn PDF document text
    • https://rigozogukex.weebly.com/uploads/1/3/3/9/133986215/9716468.pdfIn PDF document text
    • https://raguloduw.weebly.com/uploads/1/3/4/0/134041620/5777563.pdfIn PDF document text
    • https://rixijufufapug.weebly.com/uploads/1/3/4/4/134497528/a0569.pdfIn PDF document text
    • http://golivexi.22web.org/edge_of_the_empire_character_sheet_generator.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kaxemazetoralib.rf.gd/procreate_drawing_tutorial_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/how_to_turn_off_panasonic_answering_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/disunefuxalojamu.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/how_does_a_manual_pole_saw_work.pdfIn PDF document text
    • http://fokekamunedas.epizy.com/41256467432.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/cvs_wrist_blood_pressure_monitor_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/how_to_activate_adt_motion_sensor.pdfIn PDF document text
    • http://kepemusodokiwif.rf.gd/purolavasuwexonifaguva.pdfIn PDF document text
    • http://xuxegukazo.rf.gd/a_muralha_da_china_kafka.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/dozaparepotegeze.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/wakudajezutedid.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/jepefa.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/vufuwokom.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BD 1724 bytes
SHA-256: 90fb1042126c15d8a796f6f88dc26108755fb6ca519e05b6d0de05ca6d3d969f
font_01_sfnt_off0000dd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD47 5908 bytes
SHA-256: f452e9db9a38b510498aae3d41671f9714aff7302f12f42954d84fa570844720
font_02_sfnt_off0000f14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14D 9876 bytes
SHA-256: a2c6fd541adec86b205ab0ac23f5fd5a9160133432c307858bc7bc402c4e2ccb

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