Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c99598aa9e9ea5…

MALICIOUS

PDF

93.2 KB Created: 2021-05-20 05:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b67503c0f2b73de264c5d011cd702573 SHA-1: 5bf64bea04a7ccc473184d6028e80e7f38e2c27f SHA-256: 39c99598aa9e9ea55d928955feda426781914792b57406df0a5e2d0977bec241
164 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 of which are SEO-optimized, suggesting a link farm designed to attract traffic. One of the primary external URIs points to a suspicious domain, indicating a potential phishing or malware distribution attempt. The ClamAV detection and ML classifier further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • 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://nipisod.ru/strik?utm_term=smurfs+village+cheats+smurfberries+android+no+root PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474746/normal_5fe0921582bbc.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/mupajijamux-xudifuze-xekumojix-kagox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447878/normal_5fc7255717fe5.pdfIn PDF document text
    • https://tejikapor.weebly.com/uploads/1/3/1/3/131382395/liropiko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370064/normal_5fdde542eaea0.pdfIn PDF document text
    • https://wulodegekejiwa.weebly.com/uploads/1/3/4/2/134266030/dogowi.pdfIn PDF document text
    • https://rugadugunat.weebly.com/uploads/1/3/1/6/131606951/4435115.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427544/normal_5ff674fc73c6e.pdfIn PDF document text
    • https://dudisavaw.weebly.com/uploads/1/3/1/3/131380109/dizabas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427506/normal_601ad858e5aea.pdfIn PDF document text
    • https://sinitilelimokiz.weebly.com/uploads/1/3/4/3/134348988/188b31875.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464524/normal_5ff0cdacc1c88.pdfIn PDF document text
    • https://zobagitolofoxaz.weebly.com/uploads/1/3/0/7/130739917/piwopowolejeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459174/normal_5ffcc1b08b096.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/e2839d12-80d6-4f1b-8981-bd9e834905a7/xonerizareju.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/picsay_pro_apk_apk4fun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e9c319-2c0e-4907-94fc-5d7a0b6ae489/stanley_fatmax_classic_black_level_set_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e615d32-cc47-43bf-86b1-73d9b7126575/how_to_deposit_bitcoin_on_cash_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b280822-6ee5-459a-99b4-cb7c4966abd4/30591653657.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/23329096198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd059c56-9ab9-49f7-84e8-851b41604e4d/dunkin_donuts_iced_donut_calories.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/konowaravokul.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/lololefemimon.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/38407417689.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
stream_004_off000108e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x108E0 12984 bytes
SHA-256: e2521bc9567d836b2eddb4e79fd2d024075566229a1d3810f2c8df0a68af8c81
font_00_sfnt_off0000f583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF583 5740 bytes
SHA-256: fb8f2e0daaae724ac670e21559d096ef3f5e560a969114003ebba8b82992cf63
font_02_sfnt_off0001290e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290E 12076 bytes
SHA-256: 0d9f1000ecec0fe0084034404917bb3c96544cf952620e45217c16e9cc8eb8a6
font_03_sfnt_off00015082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15082 16204 bytes
SHA-256: a109d5cc1a8599929bd7702a943337bd153faf2776ff4e30ac39a15e38c17cef

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