Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbfbd4ea592ff2ea…

MALICIOUS

PDF

90.4 KB Created: 2021-03-18 09:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04284237c428de9bee32691f128ebe32 SHA-1: bce8a4fd80295a24572fd2f7a4814d6cc3e4eb10 SHA-256: bbfbd4ea592ff2ea645e3d7dc4114dd6419813e992deb5d08f408a485a633aa0
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to benign-looking documents, but one primary URL is flagged as unknown. The ML classifier and ClamAV both strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to a 'dougherty county jail report', suggesting a phishing attempt to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/123?utm_term=dougherty+county+jail+report+may+2018 PDF link annotation
    • https://firalikagux.weebly.com/uploads/1/3/2/7/132740609/lixove.pdfIn PDF document text
    • http://rufowanojona.22web.org/negepebobosodu.pdfIn PDF document text
    • http://dofuluxaruze.22web.org/bexutimedosekoputuduj.pdfIn PDF document text
    • https://gisimezibeze.weebly.com/uploads/1/3/0/8/130874543/7423769.pdfIn PDF document text
    • https://vowabogebem.weebly.com/uploads/1/3/0/7/130775978/400569.pdfIn PDF document text
    • http://sonoxusa.iblogger.org/90779552033.pdfIn PDF document text
    • http://vemiwegar.iblogger.org/24983249790.pdfIn PDF document text
    • https://vefonero.weebly.com/uploads/1/3/1/0/131070196/dimosuju-naxegagolebuso-kaxofajezaj-pazupi.pdfIn PDF document text
    • http://mesimewipotaz.22web.org/gafuxabinudanixiru.pdfIn PDF document text
    • http://zesajiwokasopaj.22web.org/37746923182.pdfIn PDF document text
    • https://suxavumopej.weebly.com/uploads/1/3/3/9/133999634/pidovolod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vibasujefir/cuisinart_k_cup_coffee_maker_descaling.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/caudillos_culturales_de_la_revolucion_mexicana.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/multiwii_2.2_software_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/atif_aslam_new_song_dekhte_dekhte.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/wazafubafojodej.pdfIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_a23dde2662ba435fbabd10ae00f5e784.pdf?index=trueIn PDF document text
    • https://7f2467c6-0d80-4e38-8df7-27624e0b9669.filesusr.com/ugd/e19533_ba974244a56e485a8f2d4ad09bc47269.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/76026706550.pdfIn PDF document text
    • http://zazaluvuzusu.rf.gd/88037678474.pdfIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_a0eb31003c884925982a4de68890de88.pdf?index=trueIn PDF document text
    • http://rodiwube.epizy.com/12450856441.pdfIn PDF document text
    • http://zutadefado.epizy.com/nibazurukozerofe.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/37306213323.pdfIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_6f85a848014c4078b899eaaaefdf0fab.pdf?index=trueIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_a0eb5d4182e549c68e1e646dba88591a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/punobovujojo.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_off0001155d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155D 5748 bytes
SHA-256: 7cb84c945ab78fa25f95e8f88e01e322a0b9c872ba2d39de9e49e4dcb10b04d7
font_01_sfnt_off000128e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E0 10852 bytes
SHA-256: 6eaf72eb4526d6a9bbeafa54e862325cc2203fc021f77e36f8bdddcc5680bb7b
font_02_sfnt_off00014dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DCA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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