Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a443805c3444d6…

MALICIOUS

PDF

88.8 KB Created: 2021-05-16 09:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 96cb13af9ced8b84c94e7150c653fb8a SHA-1: 9b2a1a5b6e15824d3c13aba0143e2b8243821a10 SHA-256: 94a443805c3444d694b23cc18c605d08d680a69b7b92e90e71b58d0aa3faaac9
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains text related to private investigator costs, likely a lure to drive traffic to malicious or spam sites. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, along with a high ML score and ClamAV detection, indicates malicious intent. The embedded URLs are likely part of a phishing or scam campaign.

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
  • 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.
  • 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.
  • 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://xajibur.ru/strik?utm_term=how+much+does+a+private+investigator+cost+in+ohio PDF link annotation
    • http://hd-cam-mirror-up1.club/rimopakowagirjjygm.pdfIn PDF document text
    • http://septiki-rf.website/lowrance_elite_7_hdi_review62psu.pdfIn PDF document text
    • http://meetsucre.pro/dd_3.5_oriental_adventures_free_downloadi1j7g.pdfIn PDF document text
    • http://umdtheatre.ru/ruwabosamuc4s8z.pdfIn PDF document text
    • https://sipovabamekejo.weebly.com/uploads/1/3/5/3/135391609/pulisowuf_motabemamomaze_desumoj.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/edc7ad.pdfIn PDF document text
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/2516102.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/bubivemizu_rirebedodup.pdfIn PDF document text
    • http://prizinsta.info/speak_by_laurie_halse_anderson_questions7f73b.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/5628001.pdfIn PDF document text
    • https://dovapudatanul.weebly.com/uploads/1/3/5/9/135985540/54eed83856e9.pdfIn PDF document text
    • http://mesretly.xyz/pemubogigugevave1390a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7de8dd8-8e9d-4cb1-ba25-b3991579c926/best_forex_trading_technical_analysis_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/951f4fda-4e0d-4ef2-abcc-97e12cacc803/26703402691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/680baa3f-2070-41dc-9433-5fb523b33b76/how_to_change_filter_on_trane_xv95.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c1c658-11cb-4111-bbcb-b2dac107318a/75140425070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af73f614-07fb-4a94-804f-7f40c381f053/65444397841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/580b3e6b-0847-4348-8420-dc57f66b7fac/xabirokewolusimel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b47c7d-280f-4bd1-b82c-b4c48ba60ee3/weapons_shadowrun_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/debee70d-54cd-437b-9528-b2cfbf122a8c/kunonijukag.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF34 7404 bytes
SHA-256: 56a8baef12b94ef12e6b4348af4e0a1cd2a4bee248353f142b3c2f2040022fc6
font_01_sfnt_off0001124d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124D 5568 bytes
SHA-256: 9bb037399d32af0eec88a9286004cdca1521aabf2bef985d11e861c92da7352e
font_02_sfnt_off00012521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12521 2696 bytes
SHA-256: 887d8e3ee0cc4dd433f84af236099758e6df9fe7bc4d80c0b0528b01b415804d
font_03_sfnt_off0001308b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308B 10716 bytes
SHA-256: e5cd697a626e530c79ff53d6af3586a090996ffb89258410630114f485ae57b0

Open this report in the interactive analyzer, or submit your own file for analysis.