Malicious PDF — malware analysis report

Static analysis result for SHA-256 361b8668e4eb21aa…

MALICIOUS

PDF

89.6 KB Created: 2021-01-21 13:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: af14e7d5ba0b581c8885446a8471e51e SHA-1: 15e0cdeef0682e07e3059402c05afac4dbbaffa6 SHA-256: 361b8668e4eb21aab0dde1b1eb144f2240c15a618cdc8c6657522af515eff578
254 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to "curly girl method products" which appears to be a lure. The presence of numerous PDF links and a critical ClamAV detection further supports a malicious classification, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://ggtraff.ru/123?utm_term=curly+girl+method+products In PDF document text
    • https://gakutuzopekok.weebly.com/uploads/1/3/4/6/134605442/2c8889b.pdfIn macro / runtime command snippet
    • https://divamokavagi.weebly.com/uploads/1/3/4/8/134871471/xanaw.pdfIn PDF document text
    • https://xazusajapefo.weebly.com/uploads/1/3/1/3/131383727/8952918.pdfIn PDF document text
    • https://wilivaja.weebly.com/uploads/1/3/2/6/132682565/roratapazatob.pdfIn PDF document text
    • https://jilarikogezinuv.weebly.com/uploads/1/3/0/9/130969280/piwoputuvuva-remesukawul-jusawatoki.pdfIn PDF document text
    • https://fotiterik.weebly.com/uploads/1/3/5/3/135328456/ad550e1ecf5c5.pdfIn PDF document text
    • https://nelizebowi.weebly.com/uploads/1/3/4/7/134734992/zediwaper_gatawunevovogu_berirosazadami.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/67594142.pdfIn PDF document text
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/nizog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vowefaxi.epizy.com/rufig.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/pululusodogi/adobe_photoshop_cs5_full_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/game_show_background_template.pdfIn PDF document text
    • http://xafegewoweli.epizy.com/nobemoka.pdfIn PDF document text
    • http://numowun.rf.gd/32217095256.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/information_classification_standard_australia.pdfIn PDF document text
    • http://dikawixum.epizy.com/zubosuxuwomirub.pdfIn PDF document text
    • http://vudatuvabejosix.epizy.com/driver_asus_a455l_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/42050455641.pdfIn PDF document text
    • http://tikokowekujuw.epizy.com/equivalent_fractions_grade_3_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/define_contingencies_balance_sheet.pdfIn PDF document text
    • http://jelemomibupu.rf.gd/jivijoxeduvifuvinej.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_off0000e3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B2 19368 bytes
SHA-256: 8301512519346c0f3996d313c88d4b8b879619d66cd5d9f5c8aedde5c34c77de
font_01_sfnt_off00012205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12205 5284 bytes
SHA-256: 45984de4b2422c2f488d3f55e293357d5c1b53706fb99154fdd2ec32ea87b4d2
font_02_sfnt_off000133dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DD 10764 bytes
SHA-256: 162edbca7db4d8c7efafb8f70f6d659f54523fcd0b7411f7caea0550a2e5ef65