Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba848801972b15f9…

MALICIOUS

PDF

79.9 KB Created: 2021-04-06 11:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b8f91f1b000b97e8281576f387faca95 SHA-1: 209286817d606548d6271f0e864d0772dec234c7 SHA-256: ba848801972b15f9647a0cbd6ec9cf55d334213b88d0cda6a98d8e32d4c51167
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a potential lure pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common vector for exploiting PDF vulnerabilities and initiating malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://pelibifir.ru/aws?utm_term=how+to+write+a+letter+to+become+a+board+member PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477863/normal_603ac516e3dca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403672/normal_5fd33ef070cbb.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/f903df0.pdfIn PDF document text
    • https://jigurojo.weebly.com/uploads/1/3/5/3/135321607/4670666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_5fd3be03ad752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496146/normal_6025b56391022.pdfIn PDF document text
    • http://pojapusevipuzu.mypressonline.com/is_the_simply_fit_board_effective.pdfIn PDF document text
    • http://xujaxul.mywebcommunity.org/19248748727.pdfIn PDF document text
    • https://tuzisufuga.weebly.com/uploads/1/3/4/4/134458332/990079.pdfIn PDF document text
    • https://lewofadexireg.weebly.com/uploads/1/3/4/8/134868993/9f806306839d47.pdfIn PDF document text
    • https://zosifoke.weebly.com/uploads/1/3/0/8/130813504/kikazawaw-nanenokixulikod.pdfIn PDF document text
    • https://garovinarabibaf.weebly.com/uploads/1/3/5/2/135293384/wovuxofuxugubarodut.pdfIn PDF document text
    • https://bodarisijusafu.weebly.com/uploads/1/3/5/3/135383154/direzesuvixi.pdfIn PDF document text
    • http://zijukikov.mypressonline.com/carditis_reumatica.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/tugurupog_gifesativituf_xugewapipowago_jepokazu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366388/normal_5fee74990f773.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiwatimab.atwebpages.com/ganekox.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/bernina_1230_bobbin_tension.pdfIn PDF document text
    • http://xakixezusasop.epizy.com/12133612512.pdfIn PDF document text
    • http://gezixerigalejeb.rf.gd/gemuwukuzez.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/kenmore_70_series_dryer_heating_element_home_depot.pdfIn PDF document text
    • http://vanepozimor.rf.gd/monty_python_intermission_piano_sheet_music.pdfIn PDF document text
    • http://vawutalakomu.epizy.com/how_can_i_program_my_comcast_remote_to_my_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/ls_dyna_theory_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/18913596709.pdfIn PDF document text
    • http://jaromazezudeg.epizy.com/makalah_askep_abortus.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/tutonibepivulejapuze.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC5 5100 bytes
SHA-256: b0f0ae32ffde44380f123d08ae04b3d533f8d36fa4e66bac30d824fb638a321e
font_01_sfnt_off00010c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C11 10900 bytes
SHA-256: 78115564db6e7f26df2f161cc5d100fc1637f3833a3dba44a7229949ff0b3a91