Malicious PDF — malware analysis report

Static analysis result for SHA-256 540698acdb09210e…

MALICIOUS

PDF

76.4 KB Created: 2021-04-05 00:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ca49ad68580c48f62d0f5e8238611d53 SHA-1: e55730373f0ea9655fbf17d4a7cc4df7dfdc9502 SHA-256: 540698acdb09210e922d63ad773967cfe51bc399c8a69b2fca509873c71dd2d5
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The embedded URLs suggest a phishing or malware distribution attempt, likely using the document's content as a lure. No scripts were extracted, but the PDF structure and external links are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://jottigo.ru/123?utm_term=arthrographie+de+la+hanche+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408865/normal_5fee49f6275ee.pdfIn PDF document text
    • http://dirozigumifew.scienceontheweb.net/how_to_train_your_dragon_3_full_movie_in_hindi_download_filmyzilla.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5fd0c1eec93b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415769/normal_600acee544c57.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/alkyl_halide_reactions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471488/normal_5fcd78138aba9.pdfIn PDF document text
    • http://jonotijero.medianewsonline.com/how_to_measure_light_colour_temperature.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380527/normal_5fda51b878a4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_601b73796e98d.pdfIn PDF document text
    • https://natitapa.weebly.com/uploads/1/3/1/3/131379406/1626381.pdfIn PDF document text
    • http://misujupino.getenjoyment.net/probability_sampling_download.pdfIn PDF document text
    • https://fepapiwepum.weebly.com/uploads/1/3/4/3/134382013/fideputabobuku_fubofupelitopug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418781/normal_605e0129d0865.pdfIn PDF document text
    • https://kajumosezu.weebly.com/uploads/1/3/4/7/134749214/negure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_5fd3bb6c383d0.pdfIn PDF document text
    • http://fajamad.mypressonline.com/8429107893.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_1f458b2bc8084b9b85342952a887acb1.pdf?index=trueIn PDF document text
    • http://kubowulurarekij.myartsonline.com/fazowuwuxipugutuj.pdfIn PDF document text
    • http://pizitibasowu.atwebpages.com/50576474413.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_5fbc79d7c45347b7b44f3c05fb3f5f03.pdf?index=trueIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_03859b9004424e8b883982c99ae17cff.pdf?index=trueIn PDF document text
    • https://507f79ed-2408-4027-b124-45ed49bded7d.filesusr.com/ugd/2de61b_2d9c62c9f3b9459c88c9834ecaa74ad2.pdf?index=trueIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_c6e563805e164c09bc927062e96d3062.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_off0000e980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE980 5228 bytes
SHA-256: b34219e66c342edcfe583566a64507241576898b3abe848a8034bf17ed9b4266
font_01_sfnt_off0000fb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4C 12280 bytes
SHA-256: ec89513b288412c6e459892bbb3007497efd1c1fd51292ad758eec2fb40dcf1b

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