Malicious PDF — malware analysis report

Static analysis result for SHA-256 242ab1886284147e…

MALICIOUS

PDF

103.7 KB Created: 2021-04-20 12:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0f685aeea0bee07ba211e2dde80a457f SHA-1: b13b81f932a26c73dff0fdd31795fac33248a1e6 SHA-256: 242ab1886284147e2f785320be1e868ee6033face1a3ab8a3ee8f6537771a2be
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is a PDF file flagged by ClamAV as a phishing trojan. Heuristics indicate it uses social engineering tactics, specifically 'ClickFix', to lure the user into executing commands via Win+R or a terminal. This suggests the document is designed to prompt the user to download and run a second-stage payload from one of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://lozipotod.ru/strik?utm_term=what+does+the+white+heart+emoji+mean+from+a+boy PDF link annotation
    • http://kuvijuwe.22web.org/80422312773.pdfIn PDF document text
    • http://momivegod.22web.org/83966044152.pdfIn PDF document text
    • https://vejikawotepux.weebly.com/uploads/1/3/4/8/134887167/gavidoxinogun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_6011d44aa9183.pdfIn PDF document text
    • https://zetojaxonafavop.weebly.com/uploads/1/3/5/3/135309172/9d577feab6d707.pdfIn PDF document text
    • https://rogetaguw.weebly.com/uploads/1/3/1/4/131407632/dorafoxagomam-xokalo-dajuvonav-vezifopizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448540/normal_601b39efb18e4.pdfIn PDF document text
    • https://nilemesobipefuj.weebly.com/uploads/1/3/2/3/132303022/kelok.pdfIn PDF document text
    • https://lusanazuwade.weebly.com/uploads/1/3/4/0/134000197/vazijisuxopojafo.pdfIn PDF document text
    • https://xemageka.weebly.com/uploads/1/3/1/3/131380316/lifozofim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480582/normal_6038b8238ca14.pdfIn PDF document text
    • https://sifukimoja.weebly.com/uploads/1/3/4/3/134357082/tojixumixile.pdfIn PDF document text
    • https://vuxisiso.weebly.com/uploads/1/3/5/3/135321279/1792f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/checkered_old_skool_platform_vans.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/kupedeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12302c9b-2eb7-4520-b406-095a6841596b/kerakiwewibepisi.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/22038642024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4e2c2d9-07a1-4713-ab2a-1ca81b111a01/dujepulidemazowebikunugux.pdfIn PDF document text
    • http://riwasepe.epizy.com/ontology_computer_science.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/xogixok.pdfIn PDF document text
    • http://femodizabofowu.epizy.com/pumpkin_carving_ideas_disney_templates.pdfIn PDF document text
    • http://bixagolowetuf.rf.gd/gajowudasizivinuwur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc0b15fd-1909-407b-bc1a-0dd7eee50cdf/mcdougal_littell_math_course_2_student_edition.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12236 3072 bytes
SHA-256: 5972c2adcc6ffe26179ac9c3dac37227c6c0043717ff054ab0497952532324a7
font_01_sfnt_off00012d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D30 5536 bytes
SHA-256: 74413439a64a24e467627bb57bbf6417be086ff87c4a38e88f256422a35af9ea
font_02_sfnt_off00013ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF7 13524 bytes
SHA-256: fd62b966f6931136c162ff4d37bedf341521a442314844ee1b6206b555c5757c
font_03_sfnt_off00016bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BC7 16256 bytes
SHA-256: 4d5ae2d1cf000779f70412656a5f837d04db284955c19412d39ba37a3bf795f5
font_04_sfnt_off0001813c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1813C 6068 bytes
SHA-256: 7173460d918b5bb2cb6fca2efdf00d9450ff55bf29fc69a8df01b6f4505c9c1a