Malicious PDF — malware analysis report

Static analysis result for SHA-256 c571b791ea6ea1aa…

MALICIOUS

PDF

69.9 KB Created: 2021-03-08 04:03:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: b99d128dad820d7635126f037953dcb8 SHA-1: 45839d24185044333371567745d3401edcb8c77d SHA-256: c571b791ea6ea1aacb44742950eedc13f00518da8b27d0b675373f4a084058eb
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF link farm. One of the primary URLs, 'https://nipisod.ru/123?utm_term=1992+dodge+dakota+transmission+rebuild+kit', is suspicious and likely part of a phishing or malicious content distribution scheme. The presence of ClamAV detection and ML classification further supports its malicious nature, suggesting it's a phishing or trojanized PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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.
  • 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/123?utm_term=1992+dodge+dakota+transmission+rebuild+kit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365542/normal_5fcbad4fd4394.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/graphic_design_pricing_list_malaysia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454995/normal_602d8ece12799.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/how_to_change_font_size_on_brother_p_touch_pt-70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385412/normal_5fe29226e5f1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_6011760d90273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5fe889796e18a.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/vixuwogetiv/brewster_s_millions_movie.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_0997117ceb7c42959caeedd0f88ec9d9.pdf?index=trueIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_bf74152f10d543949cf0a569dfdd5a97.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/campbell_biology_8th_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/7_day_diet_challenge_to_lose_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/jisam.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/92270563636.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/addition_and_subtraction_fact_families_worksheet.pdfIn PDF document text
    • http://temolujipu.myartsonline.com/24749640857.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_c9a648374d3c45e19be7e557021d0ac0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/pikalanusubonubujun.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/losazododezopobetigiteri.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/does_the_whale_die_in_free_willy.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/napetuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/cartoon_hd_free_for_pc.pdfIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_86836ad12ee44ed5973745748f5c9c0e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mavixu/jawiwewokizasiwejifekezap.pdfIn PDF document text
    • http://vovojoj.atwebpages.com/200_gramos_de_harina_a_ml.pdfIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_6f58e6bfe90c4032a72a6b74997c995f.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40C 5592 bytes
SHA-256: e0c0181af88abf7aace939dde6d3635a7420a1ae23a42990f41f7e329d2aa826
font_01_sfnt_off0000e6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 10136 bytes
SHA-256: f60dd85585c59be5d268e806ff09e39f2c75ff649a65de5dde4a1850f3d2ead6

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