Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b18ac2d4d6fdd2c…

MALICIOUS

PDF

80.1 KB Created: 2020-12-27 08:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b017b3d6596b7a096978aa4c588a3adb SHA-1: 7eaec9f426c7bbdb33f4c442a4a7d9a444d64572 SHA-256: 2b18ac2d4d6fdd2cb842e26858913f9011f9f1c6d74304e3ac06a232f4245a08
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?utm_term=npm+artillery+report In PDF document text
    • https://jositaloj.weebly.com/uploads/1/3/4/0/134042718/2650506.pdfIn PDF document text
    • https://cdn.sqhk.co/titolegun/d7ghxid/lg_mobile_switch_app_frozen.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/Ejdy79R/poker_game_world_poker_club.pdfIn PDF document text
    • https://zevefexa.weebly.com/uploads/1/3/4/7/134727867/fagepojipuguzi.pdfIn PDF document text
    • https://cdn.sqhk.co/sirazisiluz/2iccGjq/tile_floor_installation_calculator.pdfIn PDF document text
    • https://rulewosiziruzo.weebly.com/uploads/1/3/0/7/130739522/698c8.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/Rjjgghi/38588362992.pdfIn PDF document text
    • https://cdn.sqhk.co/mavozopofug/6jehbBE/ropolemipolefaduwigarumil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/xofuloxusisuwividibos.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/68697564309.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/lab_report_format_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/free_guess_who_printable_character_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/dafov.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/list_of_countries_and_capitals_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD542 4860 bytes
SHA-256: 492577980f9496f635c4f7bca400f0c30605bca068072d53fbe6ebdb4bc4b1d0
font_01_sfnt_off0000e5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BF 12032 bytes
SHA-256: 54d49d3fd3cbcc8d1e8ad248c3a9b02c5991a4b7fc83e57dcdd0715204a950b6
font_02_sfnt_off00010e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E13 16116 bytes
SHA-256: 5ec139a263af45d7cbac1bc1a000173eb4e7f97797aba0f35ce2e37505b4886e
font_03_sfnt_off0001232a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232A 4300 bytes
SHA-256: cffc7d2fae8589f88476d8b2d791baa48c9649357fb3d06e9ecdedb733c2524c

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