Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e520dcc6b75b7c4…

MALICIOUS

PDF

97.7 KB Created: 2021-03-14 18:27:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d67a21a4ad9e6422b205ef8d6d0a88bb SHA-1: 8fc5fd7f907c24fdc833a7bdc6bb435778d033f6 SHA-256: 1e520dcc6b75b7c45cc8d610de8e91d4ded0745c1a33997869c85d5a82da6800
134 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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/123?utm_term=payeer+money+adder+apk PDF link annotation
    • http://skywonder.space/follow_up_after_interview_email_templatemzuz5.pdfIn PDF document text
    • http://idealsit.space/1822000421wk1ic.pdfIn PDF document text
    • http://duplicwcnj.space/read_candy_apple_books_online_for_freesmi6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_60437c9cc1554.pdfIn PDF document text
    • http://meetsoda.club/harman_p43_pellet_stove_weightc4sav.pdfIn PDF document text
    • http://chebsvet.ru/zosukujefovaturadopebuk2x7dz.pdfIn PDF document text
    • http://natural-shop.info/famous_quotes_from_le_petit_prince4oove.pdfIn PDF document text
    • http://trend-sales.fun/15739860759mlenz.pdfIn PDF document text
    • https://nububoreral.weebly.com/uploads/1/3/4/4/134467099/d6237.pdfIn PDF document text
    • https://bewodopogogubak.weebly.com/uploads/1/3/4/8/134886142/febikibebelolu_likoju.pdfIn PDF document text
    • http://yoganchik.space/bememamuxomobasirefobiwux529zt.pdfIn PDF document text
    • http://baykamif.space/how_to_use_sumifs_formula_in_excel_in_hindicr8j4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478961/normal_5fd07fc4a1ad1.pdfIn PDF document text
    • https://kutijodokijo.weebly.com/uploads/1/3/4/7/134706590/gadofikemik_kexujizevezovad.pdfIn PDF document text
    • http://7lessons.space/lugogefegamadusiwimufela5w2vq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444655/normal_6031b6e90d805.pdfIn PDF document text
    • http://phillipen.online/7704334461806v96.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/mukut/regulatory_real_estate_ltv_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/pepogadatujezikedun.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/kenmore_elite_refrigerator_coldspot_106_water_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/munib.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/30461625439.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
    • 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
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF8 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off00010bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDD 5060 bytes
SHA-256: 303ea99383571007d3327a91c1d09774f1a07dbb369f592d0578090617b4222e
font_02_sfnt_off00011d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D02 4176 bytes
SHA-256: 82b927ea018ed8055f18716b0544e57954699707338afdcc3c5c4fff93b0acaf
font_03_sfnt_off00012da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA5 14736 bytes
SHA-256: f4e49555a1e4244333b48154befd406be68b6a9857cbe33ed91ef2622b9f3173
font_04_sfnt_off00015c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C8F 17672 bytes
SHA-256: 48a98526ccda89721e9ebba8c9ab034d90925ae0db727ff09079f9a9c173af1d