Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ec4687cb00c972…

MALICIOUS

PDF

89.5 KB Created: 2021-02-04 09:45:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9054249e12b58e2fcec3b71c5334147e SHA-1: 9cd3d09c9bc66b4cb8f909129ab0e830c42fff84 SHA-256: 54ec4687cb00c972c73adb5fc2068d7f671050d05fbe6c628924ec30cc35904f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://jottigo.ru/aws?utm_term=drama+korea+aftermath%2528+2014+subtitle+indonesia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486351/normal_5fe68671ee52c.pdfIn PDF document text
    • http://kutufirix.iblogger.org/counting_dimes_nickels_and_pennies_worksheets.pdfIn PDF document text
    • http://trells.space/11249062576yb9wn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461205/normal_5ff54afb197a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393506/normal_5fe7920517111.pdfIn PDF document text
    • http://svoytrylend.xyz/dufidujxueye.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369660/normal_5ffbc07cc6f5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530910/normal_60088562ec7af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415748/normal_6007e4551314b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369771/normal_5fcfb583bfed4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405186/normal_5fefd0dcaf9c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416792/normal_5fefa5601753d.pdfIn PDF document text
    • https://xeneniwavufew.weebly.com/uploads/1/3/2/8/132814439/ea259ada5f96d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/38272272013.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/chiclet_slicer_power_bi_report_server.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/sheet_music_boss_russian.pdfIn PDF document text
    • http://gebopotaxe.rf.gd/92579737856.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/sijoravawapagapezezilite.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012240.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12240 23028 bytes
SHA-256: e104b1196bd50e9595b47429cad4da60ceee310c2fe07a283461ec8e8e4c2e3e
font_00_sfnt_off0000dd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD93 3632 bytes
SHA-256: 9f75bed511ef86ce6d30f15eced3354d39899470c7709e06ae972ef5b43c5487
font_01_sfnt_off0000eaa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA7 5724 bytes
SHA-256: 26705903793c5f33f45671585f7471261c3aeb4cc388124d62709bfaa56d649d
font_02_sfnt_off0000fe02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE02 10472 bytes
SHA-256: 49eeb7286c367d9fda95805e657afb7c82927a46bae17a585b3af63ab660f9d1
font_04_sfnt_off000149b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149B6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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