Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1207a9932b99afb…

MALICIOUS

PDF

74.7 KB Created: 2021-03-06 07:11:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0d4677cd6d9e7eca8f26f3aa5884b0bf SHA-1: 8e4188e2e99e288006aa3d8ee580f09cad629be2 SHA-256: d1207a9932b99afbfe69c9237516b9b95914c89911935010cba004c4506ab8d4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed for SEO manipulation. One of the primary URLs, 'https://jumiwimov.ru/award?keyword=samsung+un32j4000af+stand', suggests a lure related to product information or awards. ClamAV detection and ML classification confirm the malicious nature, indicating it's likely a phishing or downloader PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/award?keyword=samsung+un32j4000af+stand PDF link annotation
    • https://nebofubegifeso.weebly.com/uploads/1/3/1/4/131437549/e44524ba93fcf0.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/74478522754.pdfIn PDF document text
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/9278489.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/f19584d3.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/kenalulokuk.pdfIn PDF document text
    • https://sogakuguw.weebly.com/uploads/1/3/1/4/131453515/2a492f3430840c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_de75b541ad3a45d7a05c5437b10fbbe4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/mera_badshah_hussain_hai_ringtone.pdfIn PDF document text
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_3c0b19d436924e989dde0c41967e408b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gudukupir/79080090401.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/venn_diagram_worksheet_grade_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42c05ee4-d49d-45c1-b2a3-ceb34293aff7/2613853020.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/narorupovanowubozaluluton.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/xavoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89517ab7-b5c3-457f-a211-2bd232426e96/77274112510.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/formal_evening_gowns_in_atlanta_ga.pdfIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_8b014008b15c477fa325b1f84c73b6d6.pdf?index=trueIn PDF document text
    • http://viwuwijagabote.myartsonline.com/42745163771.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/54617623048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c4575a-9f68-431e-88b3-8adb369821aa/avocado_feta_pasta_sauce.pdfIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/night_shift_movie_theme_song.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED5 5804 bytes
SHA-256: 2793ae065b7325d6092dc350a46d5f01ff220bde3bb67b4467a7900fb1127989
font_01_sfnt_off0000f299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF299 13816 bytes
SHA-256: e09a21dcf1d5e7d1bbfe6e81816b075f1069f6cfd65c1d9c1145130ab809b40b

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